I grew up overweight and that was the explanation for everything. I have asthma which, combined with EDS vascular weakness, causes blood vessels to burst and I have blood in my phlegm after exercising around allergens. So anything aerobic was painful. Then there's the insecurities brought on by doing badly in PE. I just didn't enjoy exercise because it was painful physically and emotionally.
You should talk to your doctor though and see if they can prescribe you a weight control drug. I'm on Wegovy and I haven't had any eating disorder problems like I did before, but I can still lose weight despite being pretty inactive.
(Sorry for the word vomit below, I took an adderall and went on too long)
My parents put me on a "diet" that would raise my allowance incrementally by the number of calories I cut--under 1200 would get some money, under 800 even more and under 500 was the goal. My dad was a physician and my mom was a nurse, so that's how they justified what was essentially an eating disorder, yet they saw my asthma get triggered during exercise and just blamed it on being out of shape. I couldn't actually maintain it so I lied about the numbers because I was so hungry and exhausted if I actually tried.
The saggy skin made me look heavier than I was. I probably had a BMI of 27ish before getting pretty defeatist around junior year when I started eating all the time because I figured I'd never be thin. I gained about 70 pounds in less than two years.
I was able to lose the weight when I was 20, but my body invited a lot of bad people into my life. My "friend" group included people who treated me like garbage because I wouldn't sleep with them (I'd had such low self esteem I didn't even think there was any sexual interest until much later). I got PTSD from being assaulted by a classmate, stalked by a stranger, and sexually harassed by two professors.
I started dating my boyfriend who could really eat a lot--think four slices of pizza with soda in a sitting--and I was put on antipsychotics because I was struggling so much with depression. I just ballooned to 30 pounds above my highest weight.
I've been able to lose about 25 pounds with Wegovy since June. It just keeps me from feeling hungry. It's great since I don't have to think about it. I do have problems with not eating enough though, so I've been super sleepy all the time. I need to consciously eat more to have the energy to get through the day and eventually work out. And since I broke my foot earlier this year trying to run, I'm trying to work up the courage to go swimming. Mentally still pretty tough.