First impressions matter and Epic fucked up big time when they launched the store. There were a lot of missing features that were available on other storefronts and it was a pain to use. Another thing that really pissed people off was when they made exclusivity deals for games that were crowdfunded. A lot of people did not like that they lost the ability to play on a platform that they preferred when they directly contributed to a game being made. It was also scummy to make deals for games that were already announced on Steam (i.e. Metro: Exodus, Darq) While the store is better now and they're funding games instead of making exclusivity deals, there is a reason why a lot of people do not trust Epic or continue to dislike them despite the free games.