I think my own mother doesn't like me
Oh dear I am sorry to hear that. Why do you think this?
She's always complaining about my life, she says I lack motivation
I'm sorry she's saying that kind of stuff.  It may be because she cares about you though and wants you to change for the better?  If everyone else is also complaining about that behavior of yours, you should look into changing it.
But I'd be a loser if I changed it.
If others are complaining to you about your behavior it would be wise to consider changing it. I must be hard for your mother to bring this to your attention so you should try to listen.