I'm using Ubuntu 20.04 with Unity right now. Unity wasn't bad. I disliked it at first because it lacked features and it wasn't polished. After some time a lot of people started liking it.

But they messed up with Unity 8 and Mir. They didn't want to work with the community, they didn't care if they were working on stuff that already existed. Instead of working with the upstream devs, they worked alone. Where did they end up? Back to Gnome Shell with a lot of years of effort down the drain.

And this is even worse. More info here: https://news.ycombinator.com/item?id=23433794