Remember that old 80's cartoon Captain N The Game Master? There are some people out there, like me, who can enjoy it out of nostalgia. But there are certain aspects that haven't aged well and some people actively dislike the cartoon because of this.
Some of the reasons include things along the lines general 80's cheesiness, Mega Man is green, Pit is named Kid Icarus, both Mega Man and Pit have annoying speech patterns, and Simon Belmont's personality is a joke in multiple senses of the word.
These reasons honestly make sense, but I have to confess, if anyone who is an avid metroid fan says that any of theses reasons are why they hate Captain N, I can't help but think they're lying.
Call it being a conspiracy theorist if you want, but if the Captain N hater in question is indeed a metroid fan, then I think they just state these reasons as a cover up because they don't want to admit that the only reason they hate it is that the Captain himself actually succeeded in dating in Samus in the comics.
Personally I like it, but you have your own opinions. Plus, because of Fraymakers I picked up Downwell and Slay the Spire and really liked both of them. So maybe that could happen with you. Does the assist roster appeal to you any more?