No it is definitely not you. Guys are selfish and frequently don’t think about even trying to perform long because in their mind it’s all about them. The sooner they orgasm, the sooner they feel like the sex is “over.”
That’s a bit of a hasty generalization of men.
O.o Who has mysterywriteher been having sex with? I mean seriously? All men only think about their own orgasm? So the guy who eats out his gf even if they do not have sex afterwards is only thinking about his orgasm? Or the guy who just cuddles with their gf while fingering her until she cums and then watches as she falls asleep is only thinking about his orgasm? I fail to see the logic especially since they are clearly not taking into account not everyone has the same levels of stamina.