It's usually a matter of framing to me. Criticizing and finger-pointing is always easier than a nuanced and tradeoff-minded view. It is also easier to engage people with negative feelings, so much of the media/Internet follows the same path.

Reality is boring: the bad parts of whatever are usually there for a reason, be it historical or goalposts that moved over time or lack of information/time/resources in general available at the critical point in time. But going through the gritty details of how the bad came to be is tedious work. You can sound just as smart for pointing out what's wrong and you can sound brilliant by signaling that imperfections make you angry.

It's just a bad habit for thought workers that you can overcome with attention and deliberate practice.