So do I, but I don't think I'd blame mobile-first designs, and instead place the blame on Microsoft sucking at making decisions, sucking at design, and sucking at mobile. Every bad Windows UI has, imo, been the result of trying to be cool and likeable by dying their hair a different colour to get some attention and getting ahead of or catching up with Apple who was playing a different game the whole time.

Apple meanwhile has made some notable mistakes, but when they do, it's usually a thorough bad bet that's just missed the mark, but if they do, it's all throughout their OS in every corner. Even with their recent Liquid glass blunder, they're not really putting a veneer that looks like wood over a rotting corpse of a house, they're just picking bad materials to update an otherwise decent layout. Microsoft's whole track consumer UI/product record imo is trying and failing to bet small but intrusively on ideas that don't work, aren't cool, and have no longevity. You see it as soon as you open the control panel that still looks like the 90s; it's this uncomfortable amalgam of failed tepid temporary marketing pitches by some department that make no sense