Look at screenshots -> wallpaper window. The spacing between elements is all over the place and it simply looks like shit. Seeing this I'm having doubts if the team who did this is competent at all

Exactly.

I know that not everybody spent 10 years fiddling with CSS so I can understand why a project might have a skill gap with regards to aesthetics. I'm not trying to judge their overall competence, just wanted to say that there are so many quick wins in the design it hurts me a bit to see it. And due to nature of open source projects I was talking about "empowering" a designer to improve it because oftentimes you submit a PR for aesthetic improvements and then notice that the project leaders don't care about these things, which is sad.