Step three.
Instead of trying to change them, see if you can change yourself. Ask yourself if there’s something happening on a deeper level. Are you comparing because you’re afraid of commitment? Abandonment? Rejection? If you follow the thread down, you’ll see that it’s usually not about what you think it’s about.

They are already aware of what you don’t like about them. You have expressed it. If not verbally, in energy and attitude. So instead of putting all your energy into trying to change someone, put all that energy into being a better version of yourself. Ask yourself what you need to change about YOU, YOUR THINKING, HOW YOU SEE THE WORLD & RELATIONSHIPS, WHAT KIND OF EXPERIENCE YOU WANT, so that you can accept them for who they are.

Step three and a half.
Remind yourself of all the relationships that didn’t work and why.
https://medium.com/@angrytherapist/finding-the-perfect-partner-vs-finding-the-perfect-in-your-partner-cf953a09f07a