You have too many vague "they", galactic "psychotherapy" and "loser", and either/or scenarios that don't exist in "reality", just in your mind/as a result of feeling depressed.

Your original question, "is it ok to continue living as a loser or. . .end my life" is what is known as a double-bind; there is no way anyone can answer well. My favorite example of a double-bind question is, "Have you quite beating your wife?" If you answer "yes" that means you were beating her (and have quit). If you try to answer "no" (because you never beat her in the first place) that says you are still beating her.

You are not a loser. And, no, it would not be "better" to suicide.

The actual problem, I see, is that you need to concentrate on yourself and becoming friends with yourself so you quit feeling you are a loser, irresponsible, etc. Calling one's self names never helps anything but can make things much worse than they have to be.