Most of the criticism of PETA you read on Reddit etc. comes straight from the mouths of the Center for Organizational Research and Education (CORE), formerly known as the Center for Consumer Freedom (CCF). It’s basically a corporate propaganda organization with donors like Tyson Foods, Wendy’s, and Coca-Cola. They also run campaigns claiming obesity isn’t that major of a problem and that you can eat 10 times as much mercury from fish as experts recommend. The vast majority of the animals PETA euthanizes are suffering and are brought to PETA’s shelter by their owners specifically to be put out of their misery, but the CCF distorts that into “PETA is stealing people’s pets off the streets” and Reddit etc. gobbles it up.
The media also knows that PETA is an easy target. Years ago I read an article in one of the British tabloids (the Sun or the Mirror) with a headline something like, “PETA blasts child’s bunny wedding!” But if you actually read the article, what happened is a kid dressed up some bunnies in wedding outfits, the “journalist” reached out to PETA and asked them to comment, and PETA said something like, “we don’t support dressing rabbits in costumes because it may be stressful for them.” And that was the end of the story, but that wouldn’t get clicks so they distorted the headline to make it sound like PETA was protesting or attacking the kid on their own accord.
Lastly; remember they’re not a monolith, and I can’t honestly say that I back everything they do 100%, BECAUSE of that.
They should still be scrutinised, but for the right reasons.