Might & Magic IX.

I love Might & Magic VI - VIII but IX killed the franchise for me. Wrong vibe, terrible bugs. I tried X when it came out, but it is also a different game.

FF Cotw why in the everliving fuck put that idiot in the game. Sure you can make millions by putting CR7 in the game same as you can make 10 grand by sucking dicks for a 20 in an alleyway. I can't believe how many shit decisions they make and still have enough money to burn on it.

Loved MK 1 then 2 blew my mind 3 was good 4 blew my mind again. Then until 9 I didn't touch anything too goofy I haven't been able to play the single player much (of DA Deception and Armageddon) but didn't click anyway. MK9 was goated. Then MKX didn't liked it at all (cant handle a game with such bad animations). Loved 11 and now MK1 is like meh.

Wasn't a sequel but I used to love League until Yone and the healing meta. Sylas saved it for a while; like I love gimmick chars and a rebel to boost, sign me TF in. But all in all the BS balance the toxicity the lack of respect for my time, it was too much. Switched to WF and couldn't believe how chill it was.

Borderlands 2 and Borderlands: The Pre-Sequel are two of my favorite games which I'm almost always down to replay.

Borderlands 3 has solid enough gameplay, but absolutely shit all over the storyline and characters.

Destiny. Played the heck out of 1, and 2 is just... Annoying. I still play, but I actively disuade people from picking it up.

It went from a mechanically fun game with garbage storytelling but amazing lore, to mechanically complex and hyper specialzed, still mostly garbage storytelling, and lore that is trying to constantly one up itself or nonexistent. The seasonal model was a mistake and it's grindy for the sake of money. It really took a terrible turn down sitcom alley of having the seasonal content need stakes, but also not really change anything drastic. So it just feels like tasks for the sake of tasks... Which it is. A neverending treadmill where grinding has only very short lived rewards.

Dragon age 2, Mass effect 3

ME3 is particularly bad cause most of the game is exactly as it should have been, and then the ending is pure unadulterated trash.

Don't play many sequel games, so it's hard to say.

Evil Genius 2. I loved Evil Genius 1 as a kid. It was far from perfect and had a lot of bugs, but it was a blast. I'm fully aware there's a lot of rose tinted goggles going on for it in my mind. But I thought the new one would fix problems and be more enjoyable. It did improve on the first in a lot of ways, but it was so so grindy.

In EG1 you could send you minions into the world to steal money and complete missions (that gave points or loot, like stealing the Eifel Tower). I'm EG2, they kept this mechanic, but anyone you send to the world map is just gone. They cannot come back. This leads to just an annoying constant flow of recruiting more minions, training them to upgrade, and them being sent to the map forever to never return. It would perhaps be slightly better if you could increase the rate you recruit minions like the first game, but instead they always come at a constant rate and there is a button to recruit more but it's buried in a menu. So many things in this game are buried in a menu.

Another frustration, they added a feature to automatically tag enemy agents that come to your base (to be killed, captured, distracted, etc) but they're all under different research tiers. Why require the research at all? Right clicking agents and saying "tag for capture" is just pointless busy work. Even in the original you could hold control when you did it and it would flag the whole group. Not anymore. You can only tag one at a time.

There are just so many little things like this that made the game so annoying to play. I wanted to like it. But I just couldn't enjoy it. The new art style is worse, too. It keeps the spy fi aesthetic but it's much more cartoonish. The game is more diverse which is nice, the original was like all men. I also liked what they did with John Steele, the main antagonist more or less. Canonically you beat him and killed him but they pass on his mantle to new agents and train them to be like him. And they're relatively weak, but like a constant threat.

I was a Siren main in Borderlands.

Every new game in the franchise made me hate Lilith more. I think I may have cheered at the end of BL3.

Hal0 4 and Below Zero come to mind. Facebook buying beatsaber and ruining it with their filthy little hands, too. It took a huge nosedive in quality.

My first experience with this was Last of Us. I wasn't expecting good things for part 2 after hearing things about hostile takeovers but killing off the main guy just ruined it for me.

Castlevania Lord of Shadow 2. Loved the first one and 2 was just bad. I wish they would have kept it as a God of War clone, with stunning visuals, game play and music

Mass Effect Andromeda. I feel like I'm the only person on the internet who liked the ending of ME3 but holy shit Andromeda was fucking awful.

World of Warcraft ruined Warcraft.

Capitalism ruins franchises.

Oblivion.

Daggerfall was awesome and Morrowind blew me away. Going into Oblivion I had the highest hopes. Bought the Collectors Edition, took the day off....and biggest disappointment from a game ever. Granted I like Skyrim. Not as much as Daggerfall or Morrowind, but far more than Oblivion. So I guess it didn't kill the franchise for me.

Bonus popular game that actually killed the franchise for me: GTA4. I loved the Trilogy, but I could not stand IV. All the main characters annoyed the piss out of me, the driving and gun play weren't nearly as fun...I tried to play it but got burned out around 1/3rd of the way in. Tried to play GTA5 a few years ago and I felt burned out after 40 minutes.

KSP2.

Fallout 76?

I played it with coop mates (via game pass IIRC), all EGS fans since Oblivion, well after 76 was released and patched up, and it was just… boring. And grindy. Yet kept trying to upsell us stuff. I kinda get how some like the game with those BGS environments, but that was still a shock to me.

Starfield did nothing either. I watched YT story videos/tried the intro out of a friend's Steam library instead of buying and felt like I was looking at a AI slop Skyrim mod, both technically and in terms of writing. Again, I’m a hardcore fan going way back, warts, glitches and all.

It’s remarkable the studio has fallen so far, without basically changing anything, yet still has such a loyal following. How is that even possible?

Any Splinter Cell after Chaos Theory

Also,

Assassin's Creed: Revelations

followed by Assassin's Creed: Unity

followed by Assassin's Creed: Syndicate

This is going to show my age but Master of Orion 3.