Have I ruined my Sexual Health?

When I (M) used to be 16-20 I was a really REALLY big porn/sex addict, ig that's just puberty but this was on another level. I used to watch porn everyday multiple times and finish almost 9-10 times everyday.

Once I got a girlfriend we used to do everything and I used to last for a very long time. All I needed to do was just finish an hour or 2 before I meet her and I noticed I could keep going and just slow down when I feel like finishing and repeat the process. I used to hit the gym play for my school's football team, do kegels, breathing exercises, edging and all of the above and I felt as if I could give Johnny sins a run for his money.

Once I broke up and failed a few main exams in high school, I started smoking cigarettes, pot and drinking a lot. My girlfriend also had broke up with me. I became a severe porn addict. I gained 20kgs (44lb) and lost all mobility.

After 2 years of this lifestyle I thought I needed a change and started looking for a girlfriend while getting my studies In check but the only form of 'finishing' I had was with porn.

I slowly started noticing that even while masturbating I could feel myself finishing really quickly, maybe 1 minute, although I can stop before I finish, when I start again once calmed down I still last for only 30 seconds to a minute before HAVING to stop.

I have another girlfriend now and even with her it's the same case, most days I last only for 2 minutes and that too with breaks. I am 23 now and this is severely affecting my mental health and have zero confidence now.

I started doing kegels again, I've limited alcohol and everything and I plan to stop it all very soon because frankly satisfying my girl is more important to me than any other dopamine.

What the hell happened to me???? Is it possible for me to go back to how long I used to last?? Do I need to edge without finishing? Or do I completely stop masturbating even though that's my practice for lasting longer.

I really need advice as my girlfriend feels bad that it's her fault and it's killing me. Has anyone else had this happen to them before?

TL;DR - Was great in bed but porn addict, got depressed and fat and now can't last longer than 2 minutes