Yeah I 100% agree with
@BeMe here, took getting absolutely everything sorted for me to change. I had the same gut and tits combo for over 20 years. No matter what I did nothing would ever change one way or another. Never got any bigger or any smaller through various longterm extreme diets (not for fat loss, self sufficiency through peramaculture was my goal in the decade I experimented) including 5 years vegetarian and about a year vegan mostly from plants I grew myself until my teeth started falling out. And that was starting at 30 not 40 where I am now.
It's likely going to be something about diet or training man. We can lie to ourselves easily without realising. Through all that dieting I just mentioned, I used to say the same thing about my progress vs expectations and compare myself to others doing the same thing but I didn't even consider factoring in the reality that I drank 24 beers a day, every single day for those ten years, about 3400kcal as a baseline before I'd even eaten anything. It's wasent denial it was a blindspot. It seems retarded even to me now but that's the truth of what happened.
This is why logging is so powerful, it would have been two posts before someone said "what about those two beers you said you had?"
My advice would be to try find a healthy diet that is sustainable long term for you and make the lifestyle changes needed to maintain it. For me that meant quitting drinking. I wanted so badly to start lifting and steriods after my friend and I saw Bigger Stronger Faster in 2008 which revealed to us that steriods aren't as dangerous as we thought, and we decided to start. He quit drinking immediately and starting changing, but I could not quit drinking. I attempted to get clean so I can start steriods several times and couldn't. Even bought $1000 worth of gear of the original silk road in 2012, and ended up swapping them for an 8-ball two years later when I still haven't cleaned up to start. I'm on week six of my first ever use of testosterone after sobering up at hospital detox two years ago.
Diet wise it was the carnivore diet I initially had success with, been off and on it for 7 years now and highly recommend at least a 90 day trial to see. If you don't like it you can use it as a form of elimination diet. Once adjusted to the meat and it's been at least a month, if you want to stop it you can reintroduce other types of food one by one and monitor thr effects and take notes.