Not at all. Not all obstacles are equal, and there's such a thing as too much. Yeah, I don't like Platinum Rush very much. Its particular challenges aren't fun to me, and there's not really any smooth line through it if you want to set competitive times. I'm not too keen on Orcus Black or Vostok Reef Black either, which are both pretty tricky tracks from the DLC packs. And of course a few from the other games.

We're not speaking objectively though. We're discussing opinions. Only tracks that have serious glitches (such as respawn points within the track limits) would be objectively bad, and there isn't really stuff like that in Pulse (only when you push it too far trying to cut corners! ).

and good flow would be a track that gives you visual cues. a track that blends visual design with the physical attributes which results in cohesive design. not Outpost 7.
as for De Konstruct its mostly the visuals that hurt it more than anything else. and the split on the Black run though a nice idea was not done well.
This is incredibly vague...