I’m with you OP! I hate it hate it hate it, for so many reasons - including that the hot sweaty feelings can trigger existing anxiety & PTSD feelings for me, and if it’s not that, I just find it so boring. I’ve also got some health issues which make exercise harder and more painful for me, but annoyingly, regular exercise also helps alleviate some of those symptoms so I know it’s something I just HAVE to do.
Here’s what has worked for me - DON’T start with something that is very cardio focussed. Yes, it’s good for you & yes over time you’ll learn to love it & get the endorphins etc but it’s not the right place to start for an exercise hater, it’s too big of a jump. Start with something slower that is more focussed on strength, muscle building and flexibility - Pilates, yoga (so many different types to try), Qi Gong, Tai Chi are all good.
Pick something that is at a fixed time (class or appointment) & that costs money...honestly this is the only thing that has helped me get into a regular routine. I pay a trainer for private 1:1 sessions, and before that I paid for packs of classes that had to be used in a certain time. For me, if it’s scheduled in AND I’ve paid a decent amount for it, I’ll show up and do it. If I have to rely on my own motivation to do a workout I either won’t bother at all, or I’ll just half ass it and cut corners to make it easier which defeats the point.
Also, building it into your day, like cycling commuting / cycle school run has really helped me. Cycling for the sake of it? Ugh, so dull. Seeing how quickly I can get somewhere & feeling smug about the cars sat in traffic? So much better!
I enjoy the stuff I do now & miss it when I fall out of routine, but I had to build up very slowly and it took at least 3 months for me to feel I “enjoyed” anything about it (probably more like 6 months if I’m completely honest).
Also - don’t let this be a thing you guilt or shame yourself about OP. I think there’s a bit of nature / nurture here.... people who grow up in sporty, active or outdoorsy families seem to naturally enjoy exercise more. If you didn’t have that upbringing (mine could not have been further from that!) then it’s going to feel foreign to you, and it doesn’t make other people better / more worthy than you.