My interactions with *STP's in real life have been mostly negative. I imagine it goes both ways.
He's gotten negative comments from some admitted INFP's...In one video, he accused INFP's of pretending to be INFJ's. It doesn't seem that he has evidence to prove that these INFJ's are "fakers" or INFP's, but my guess is he's labeling most negative perceptions of himself as stemming from INFP's. It feels good to put a label on problems. It makes the problem less about him, and more about INFP's.
I watch his videos as just a way to understand an ESTP, and merely what one guy thinks. I'm analyzing him more than I am applying much value to what he says. I'm not sure INFP's always take this perspective. Maybe we're a little touchy.
I've never watched any of his videos, and though some INFPs I want to punch in the face, I don't feel that way about all of them. though sometimes I want to punch myself in the face I just can't stand people ripping on a whole entire group of people.