1.) DRAMA- the closer they got, the further I pulled away, and the more drama there was. I tolerated too much and hung around too long multiple times.
While I don't pull away as they get closer, I have definitely ended relationships over too much drama, including my most recent 18 month relationship. Like you, I tolerated too much drama. It's difficult because women are all dramatic due to their emotions and it's tough being realistic with yourself about how much of it you would need to accept in order to be in a relationship vs how much is too much. I will say that in the last relationship, I ended it faster than I ever have before (due to drama,) but my mistake was taking her back multiple times after she immediately came back on her hands and knees begging the next day.
3.) LACK OF DEPTH- sometimes there isn't much under that sexy body. If all we have is superficial conversation it won't last.
Surprisingly I haven't really come across this. I think the type of women I'm physically attracted to, and who are attracted to me, tend to not be brain-dead. I can really only recount one girl like this and she was very close to a 9. She wasn't dumb but was a bit of an odd ball and I think I would have been annoyed with her if we were anything more than FWB which is all we ever had.
Instead, I have ended up in the situation a couple times where I got together with a ~6-6.5 and wasn't quite sure how hot I thought she was, and figured maybe if I got to know her and the sex was great, I would be satisfied. With one exception, that never worked out for me. Sex with them quickly felt like more of an obligation than something I wanted, and I would have to drink a bit to motivate myself to do it. So I generally stick with 7s and above. This isn't a brag - my 7 may be another man's 5 and yet another man's 10 - who knows. The one exception to all this was a girl with a 5 face and a 9 body. Her incredible body, the best sex I ever had, her extremely confident attitude, her athletic achievements, and a lot of depth of conversations and mutual interests made me fall for her. But in the end I had to force myself to dump her and move on because of:
I made the mistake of continuing to invest in her even though she wasn't investing in me at the same level. I learned my lesson.
Another reason I would add is fear/insecurity and
controlling behavior. Fear and insecurity generally manifests itself as DRAMA, which has already been covered, but controlling behavior is a huge red flag. When she starts making demands like "you need to block your ex on social media" or slowly trying to isolate you from friends by guilting you etc, I've learned that it isn't enough to just hold iron-clad frame and not comply. You just have to eject because women who do this are too damaged to be in a relationship with. I thought holding iron frame and refusing to comply would make her come to the realization that her attempts to control me weren't going to work and result in her ultimately giving up the control attempts, but these types of women are the ones who would continue putting their hand on a hot burner even though they've done it 100x before and been burned each time. They are stuck in a loop they will never escape from. Don't be so narcissistic in thinking YOU are going to be the one to finally get through to her.