> Turns out leftists love self criticism for self improvements.

they really don't, and this is one of the reasons why there is so much fracturing in the left, usually.

Isn't that backwards? In-group criticism is how you get so-called "fracturing", which is arguably healthier (if less politically useful) than the alternative: "loyalty". I'd be highly suspicious if any group of tens of millions of people all ostensibly agreed on everything.