Dang, this video sums up basically all my problems with Sonic CD. A good watch. Hirokazu Yasuhara's absence as level designer in CD (compared to him being in the entire Genesis trilogy) is very much felt.
Can't help but agree, I ****ing hate Sonic CD's levels. BUT.
Sonic CD's actual
CD looks ****ing amazing.
The actual aesthetic of the levels I don't think are bad, I actually really like them. I love the surreal, trippy and futuristic feeling CD gives off. Each Zone had its own surrealism that made it unique.
I also disagree with "they don't look like actual places" critique. In Collision Chaos, the VERY TOP of the level...is Never Lake.
Collision Chaos is at the bottom of Little Planet. That is some cool attention to detail.
If you place them side by side with levels from the trilogy they don't
look out of place:
I think as long as the level looks cool and doesn't go too overboard with the colours like Amazing Arena from Chaotix then it's fine.
Don't even get me started on the Special Stages. This early 90's fantasy/ futuristic oil painting, Planet Mega:
Made for a really awesome area in the 4th Special Stage:
I would like more Sonic games with this kind of atmosphere. As trippy and surreal as Special Stages tend to be across all Sonic games, those are actual locations described as another dimension in the Japanese manual to Sonic & Tails 2. People even live there like Fang, that's why you see literal cities and junk.
They may not look realistic but they are actual locations within the world itself.