I grew up watching TOS, and wasn't immediately fond of Next Generation, but grew to like it. DS9 and Voyager.......I just couldn't get into at all, but the lore was still interesting and viable to me personally. When Romulans were made into STO's "gold side" equivalents, I was....not pleased. I saw it as plagiarism and still do.
Additionally, the game started taking too much of a pay to win turn. (at least to me, it did. Side note: all this is just my opinion, and what I took away from my in game experiences)
Ground mission gameplay was atrocious and balance in PvP was nonexistent.
When Cryptic put out Neverwinter.....I tried it. Even max leveled a character. Then they introduced their equivalent of a mission architect and as I recall, claimed they pioneered the concept of players building their own missions. I was vehement. Emmert was again plagiarizing CoH and their innovations as his own. Each one of Cryptic's games left a sour taste in my mouth and I stopped playing them altogether.
Again, all this is based upon my in game experiences, and only my opinions. I hope this answers your question. 🙂