The problem is that depression isn't fun.*
This is coming from someone who has had mental health issues in the past.
While Kaladin is a really compelling character, and also very realistic**, his POV's can be really painful to read. It would be nice if Kal, could have a period where things get noticeably better, and it stays that way for a while. I wouldn't want Sanderson to cut out the struggle***, but reading about depression can be pretty painful. I like the fact that Sanderson includes main characters with mental health issues, it gives his story a sense of realism, and I do find it strangely comforting to read about Kal's struggles. But his POV's can also be really painful, and it would be nice if there were some periods where his depression wasn't looming over everything he did.**** *****
*This should be obvious
**one of the reasons Sanderson is so good is he tries to portray mental health issues realistically
***It's part of why Kaladin is such a good character
****This isn't unrealistic
*****Sorry for all the footnotes