Yet how are the alternative ways of thinking about it better? Spending your time angry about what others can do? In any era, that’s a poor life philosophy.

The problem is the same as it has always been. Figure out how to use your time and attention effectively,

A sufficient number of people being angry about something is how you end up with social norms. These norms will shape how the technology is used.

Conversely, if your take is that there's no point being angry and we should just take it in stride, that just emboldens the producers of slop.

Is it possible to be critical without being angry? Are the only options here misplaced ire or total queiescent fatalism? Does the site here even seem excessively angry?

Strategic, directed anger is an important component of using your time effectively. It sends a clear signal that certain kinds of behavior are unacceptable and people who'd like continued access to your time had best not engage in them. You shouldn't go around yelling at people every time you get a bit frustrated, but you should and I do express anger when someone signs their name to LLM-generated Slack responses.