Maybe it had some glitches on release
I haven’t heard much about it as of late and won’t comment on its current state, but when it first came out it was a glitchy mess. Several reviewers mentioned how glitchy it was and docked it points. dunkey made a whole video showcasing glitches and odd design choices. It’s a step in the right direction, so they deserve credit, but that doesn’t change its shortcomings at launch.
There are over 1000 Pokemon at this point. There’s bound to be some level of similarity here and there. Gamefreak even designed Pokemon after other creatures, so it just seems somewhat silly to point a finger.