We have similar metrics, except my first date lay rate is almost 100%. It sounds like your charm is weak. Also why do you think you're a bad person? I've probably done worse than you lol.
From reading all this there are two things that come to mind given your goals of casual fun without LTRs.
1. It's called a rotation for a reason. Most hot women worth fuucking aren't content with just being fuucked unless it's a one off convenience, they want a trophy husband or otherwise something deeper. Hot girls can't go down the street without tripping over c0cks wanting to fuuck them. If they just want to fuuck it's easy. You have to be worth the inconvenience of waiting or going to your place, which is why that first convenience fuuck you have to really blow their minds.
The women that are confident enough to just be FWB are less common, and in the back of their minds they're still trying to pick one guy to have something more serious with. If an LTR is really not something you want then embrace the playboy vibe and quit dates after the first solid date. Meet up for a quick coffee outside your place or invite them over. Or if you're driving by their place tell them you're stopping by to give them a nice stretch. Ideally they can communicate their desire for something deeper, and many of the women that take care of themselves will likely pass on you when you say you want to keep it casual. Some will continue seeing you but randomly drop off as they find the LTR they were looking for.
Some that are head over heels for you will continue your game and try to strap you down. But after a while of no progress they'll cut ties out of frustration. This all just comes with the territory of keeping things casual.
Some will love spending time with you and you'll end up seeing them more often because they're just so fun and easy. This is likely the girls you'll naturally fall into committed open or closed relationships with. It will not feel like a pain, it will feel fun, organic, and like a natural next step.
2. You haven't mentioned your hammer or performance and how girls react to sex. If you're laying pipe for hours, sweating all over them, twisting them up, and you've got a decent hammer women should be going absolutely nuts when you fuuck and happy to give you more at the drop of a hat. Since you only want casual fun this is where you have to outshine all their other prospects (since those guys will offer things you won't). If you're selfish during sex or you're not fuucking her for hours or until she taps, then you're likely nothing special to her and worth a pass or little effort.
I could go on but would prefer more info on the above.