When you're talking to an open source dev, just remember that they are literally giving you their time for free, and they are people who don't like to be treated poorly.
Edit: Just to be clear, I don’t mean any ill will toward the guy. He’s frustrated and he’s just taking it out in the wrong venue at the wrong people, but that doesn’t mean he’s a bad person.
Edit 2: The reinstalling he’s talking about is NPM. So just running npm install. It’s because he tried removing the node_modules directory, which is a reasonable thing to do, but it means you need to reinstall the modules with that command.
Keep in mind though that Lemmy is very much still in open beta while Reddit has been a mature product for years now. Lemmy only started federating like two years ago, and even compared to other Fediverse platforms Lemmy is still very new. Most of the "must have" features people associate with Reddit took a while to materialize as well, in fact when Reddit launched it didn't have subreddits or even nested comments on posts. Not saying your grievances are invalid, but give it time and things will improve as Lemmy gets more development.
IIRC it always had threaded comments but yes subreddits took years. Shamefully I was very much in the anti subreddit camp and argued fiercely for tags instead like Flickr (RIP)
Lemmy with Sync is pretty baller though not sure what everyone is complaining about.