Maybe it would be helpful for you to practice accepting other people's compliments by just smiling and saying 'thank you'. I used to reject people's compliments. But I stopped when I discovered that some of the things people say to me- even if at that moment I am disbelieving of it- puts kind of a compassionate seed in my mind. Then whenever I am in a dark place or very in need of kindness I can remember that thoughtful thing someone said to me and it comforts me.

Also I try to be very sincere. So when I tell someone a compliment I really mean it. And I've tried to make a habit that if I think something kind I remark on it (because I know how much it can mean) even though it can be hard for me because I am shy and a very poor communicator. So when other people say 'thank you' they are acknowledging the act.