Might be true to an extent. We are trying to organize with the goal of revolution after all. I imagine that takes some level of rage against capitalism.

But there's also the fact that one of the most successful ML revolution with the USSR has since been countered by the bourgeoisie. Though fortunately China is on its way to dethroning the US now so later revolutions can pivot to them.

ideology that channels sadness and despair

Sounds like doomerism, unless you mean channeling it into organizing ig