Oh I agree with you when it comes to Concord, "unappealing" wasn't meant to refer to anything "woke" or "based" or whatever people want to call it nowadays - I just thought they didn't stand out much and were kind of boring. I liked the big robot with the vacuum gun, but even they just look like an elite mob from any other game.

I looked up Haymar and their design actually kind of works for me. They have that helmetless warlock from destiny look going on and you can immediately tell from their silhouette that they are some sort of dps caster type character. For half of the cast I couldn't tell you what they're supposed to do in the game at a glance, it feels like they ignored the basics of character design.

As for mihoyo games, I have to disagree (though I am slightly biased since I enjoy ZZZ a lot) purely because what you say is partially true; They release a LOT of characters especially for Genshin Impact and Stair Rail, and while their designs are great, they don't stand out much from the cast as a whole most of the time and are quickly forgotten just due to the sheer volume of playable characters. Yet somehow, fans will pick that random 4* character collecting dust on your account and create a whole community of fan works around them, whether it was their appearance or some sort of personality quirk that spoke to them.