Earlier quoted context omitted.
Not sure what that is meant to convey except scorn. Discord's UI works fine for lots of us and I don't see any relationship with Chuck-E-Cheese here.
it means it feels age-inappropriate for an adult to use, like hanging out at a children's arcade
UX preferences aside, I think it's a really bad fit for businesses compared to slack, because it seems to also want to be social media, where you have one profile across servers, where slack and others are team-centric.