That's not really how it works. People like it in spite of the bad vibe coded UI. That doesn't mean that the UI is good. The criticism was clearly correct. I don't feel bad about publicly criticizing the UI to your face, either, because it's not like you were the one who designed/created it anyway--by the same reasoning, I don't see any reason to get defensive about it, since you have not invested very much of yourself into it either.
This has become a bit of a pet peeve of mine in general. Over the last six months or so I've been inundated with all kinds of lazy, bad vibe-coded UIs via my normal internet usage. It feels paradoxical in a way, because AI tooling should make it easier than ever to fix obvious problems, and yet UIs have gotten worse.
I have two theories for why this is: (1) usage of AI tooling conditions people into engaging with their creations in a certain hands-off, uninvolved, low-attention surface level way; or perhaps (2) those who care about their UIs were the people who were already creating UIs pre-AI, and so the marginal effect of AI tooling has been to increase UI creation amongst precisely the population who cares the least about what they are putting out.
I've also been developing a very strong personal revulsion towards the Claude default design language, including and especially the gold-on-black color scheme, although I admit that this is entirely by association and not because of its inherent qualities per se.