Quote:

The breakup gave me abandonment issues

From what you write, your abandonment issues seem to pre-date this recent breakup. In your own words, this is the pattern you resort to, as you explain that you did the same with your ex ("I was back in that same headspace with my ex that I ended up speaking to more men and continued to hook up and even go on dates.")

This is the heart of the problem. You are depending on someone else, i.e. these men, to make you feel good enough. No one can do that for you.

And you are correct, it is *never* going to feel enough because you do not value yourself. This dependence on external validation will never be enough. Not until *you* value yourself & not until you choose to give of yourself (physically, emotionally) to men who deserve you, *not* men who use you - as is the case presently.

Do you feel you matter? Do you feel you are good enough? This is where the problem starts. Work on yourself - depending on other people to feel any sense of worth is what you need to work on first, before getting into any relationship.