He never seems to appreciate, encourage me but breaks my self confidence, self esteem in every opportunity that he gets, leaves me in troubles. Why?

[Anonymous]

[quaranta]

That sounds like a description of someone who doesn't love you, and the requirements to call it an undesireable relationship. Love is made of care first of all. If what you get is humiliation, anxiety, being belittled, put down, invalidated... Was this what you wanted to get from a relationship, before? No... And that is not wrong to aim at what you want a relationship to be, because decent guy are all around us.
The reason why he is doing that is probably some malicious drive related to a narcissistic trait but we can't "diagnose" him with so few data. However, it doesn't matter much, what matters if how you feel, and that you are the only leader of yourself. He won't rescue from himself, you have to set boundaries, to have requirements on him, and to communicate to him about your emotions. If he doesn't care (most likely), that should be the served deal-breaker for you, because it would mean the relationship has no love left and that he is not willing to work on the relationship at all.
So many women on this website and on Reddit getting abused like that, at least one every 2 days writes a similar story here...
Make sure to keep contacts with people you trust, to not start believing the humiliations your partner throws at you.

[Guy13]

This guy has no empathy for any human pain, pleasure, or anything else. the best thing you can do for both your mental and physical welfare is to go the other way when you encounter him. He is totally self0absorbed bordering on sociopath.