I miss the young me

Hi guys this is my first post
I’m 35 now and I’ve had worries for a long time about sex. Desire doesn’t seem to be as high as when I was like a teen and I’ve given myself years of death grip and porn.

I’ve given myself some kind of complex and when I have partners I quite often can’t relax and then struggle to get off other than by my own hand or by me being on top as I can go fast.
If I’m very comfortable like I was with a Thai gf I could get better erections and finish by a BJ once in a while if I was real horny.

I want my satisfaction and desire to increase like it was when I was in my teens when you think about a girl in college and get a raging hard on.

A lot of the time I love the idea of stuff but the actual doing of it doesn’t get me excited and just increases frustration as I know I like it. It’s a strange one. For example I’m a foot guy and would love to enjoy a footjob but the friction and feel just isn’t there. I feel there is something wrong and my brain is fucked.

I’ve had bloods done which was good and I get boners when I sleep and mornings and sometimes when I’m relaxed. I do get more excited with hotter girls like on a date I like the physical contact and kissing and embracing and stuff but masturbation is almost just being done as a dopamine hit. I’m also on sertraline for anxiety which I’ve heard can decrease sexual desire but I just feel like I want to be able to have relaxation and high satisfaction through sex.

Has anyone else ever had similar experiences in anyway?