Elle has some pretty obvious red flags that any guy with a quarter of a brain would be able to detect after a month of dating, yet so many dated her longer than a month, which tells me she had her shot at keeping any one of them had she not Elle'd it all up.
She could have held on to Chris if she didn't try to remake his space into hers and gave him something more to value than her looks, so that, when he realized his income was going up, he wouldn't just trade her in on a newer and less-annoying model.
She could have held on to Joe if she just acted like a human being in front of his friends on the camping trip instead of being a cartoon. Even if she screwed that up, she could have recovered and kept him by paying her share and making sure his interests and passions had a place in their home together. Even if she didn't do any of that she maybe might have held on to him if she hadn't made a huge show on social media of how much she loves taking things from him.
She could have kept Rick if she just addressed what is a very real addiction and got help for her destructive and compulsive shopping, instead of just keeping on doing it and hiding it instead.
If she's got a new guy, I don't think I'd go poor on betting that she'll find a new and unique way to lose him, but I think every new way she finds points back to the root problem that she's likely incredibly selfish.