I feel like I’m horrible in bed

I’ve been with my bf for three years. I feel so incompetent in bed. I’m not good at riding and everytime I try he only lets me go for a couple seconds before he just takes over. I’ve never been able to make him finish from head either. He’s told me I just need to practice. Everytime I do he never finishes and then he tells me what I should’ve done. I eventually stopped doing it bc it was just embarrassing more than pleasurable. It felt like a test more than anything. We’ve gotten into a couple arguments about the fact I stopped. He told me I was bad but that he wants me to just practice so that I can get comfortable. I’ve tried everything though. I’ve tried everything he’s recommended, I’ve watched a porn video he showed me of what he wanted, like idk what else to do. He always says “it’s not rocket science,” and that I’m just overthinking it.

He told me he wants head so he has something to look forward to and he’s told me once before that he wasn’t satisfied bc I wasn’t giving him head.

I’ve never been with anyone else. My friends are saying this seems more like a him issue but I can’t help but think I’m just bad in bed.