I've found lots of total crap in the self-publishing waters.
But I've also found a lot of total crap in the tradpub waters too.
self-pub outnumbers tradpub, so the self-pub crap easily outnumbers the tradpub crap.
I will admit to being lazy enough when it comes to both sides, that I usually prioritize authors whose books I have already read and enjoyed.
That does favor the tradpub side...