I'm someone who loves running, always have, the weight gain happened in my 30's, either because I had a kid and suddenly my ability to just run when i had free time disappeared, or because my metabolism slowed down, or most likely both and more.
That said... Now I've started running again daily for the last year, one thing I've noticed. Beginning to exercise whilst overweight is SIGNIFICANTLY harder than it was when normal weight (or because i was 40, probably another "both" here too).
One of the things that made me realise how much harder it is, was some fitness YouTuber put on 20kg of weights and ran, he noticed a number of things were different. Once I saw that it gave me enough fuel to continue ignoring the hunger for another month or so.
If I recall correctly runners estimate about 1 second per km per extra pound carried. That might not hold for body weight (cyclists had an old 1:2:10 rule of thumb that suggests that it might be better to lose 5 lbs than spend a fortune on a pack/bike that weighs 1 lb less, but that rule has been challenged and I don’t know what the new wisdom is.
Edit: kilometers not miles.
Look, I used to be in better shape than pretty much anybody here. Unless you’re an Ironman veteran I have nothing to learn from you about exercise and I can probably teach you a few things. But health problems, especially joint injuries, happen to old people, and they happen much more often to people who are rabid about exercise. I’m not you ten years ago. I’m you twenty years from now. So drop the smug bullshit and learn something.