Well I wouldn't say most, considering the vast majority of people watch porn, even people in relationships.
What you are saying is proving my point. Many young men have a negative view on sex. From fukking hella women, not because you like it, but because you use it to brag, from viewing women having sex being bad, from being insecure about your dikk size, to trying to perform porn moves in real life before talking to your partner about it.
This is not a porn problem but a problem with a traditional masculinity mindset. There is not any even introspection on your part you just blame porn.