For me personally, I don't hate Ubuntu but eventually I found it a bit frustrating. IMO they have a habit of picking a thing they think is shiny (eg: Unity Desktop, trying to converge desktop and phones, Mir, currently Snaps) and just going ALL-IN trying to force it to be a thing, regardless of whether people want it or if it makes any sense. Then they keep pushing until it's almost actually decent, then drop it like a hot potato and chase after some other thing. So for me it always felt like important things were being neglected for the sake of whatever they think is cool at any given moment.