It's useless without describing concrete, practical solutions to those problems.

What do the voters want? Zero taxes, no crime, world peace and infinite benefits.

It's easy to identify things as shitty because the above doesn't describe the world yet and thus it's a banal observation. Implementing real, practical improvements is really hard and requires much more thought and consideration and introduces the possibility of failure. Which is why that part isn't discussed as much.

Constantly? As if it were a psychological compulsion? So often that dang had to make a guideline about it, which no one even attempts to follow?

Two actually - the guideline against being "curmudgeonly" is separate from the guideline against going on a tilt because you get triggered by any website that doesn't look and act as much like plaintext as possible.

And yet if someone so much as cracks a joke they get rapped across the knuckles and lectured about a rule that doesn't actually exist (no humor allowed)?

Yes, that's negative. That's a culture of performative misanthropy.