It's a common issue and it's not your fault. In some ways people are made to be this way.

The basic idea is that when a person is treated negatively for long periods of time they become used to that behavior and they expect it. Instead of being attracted to positive reinforcement they become attracted to negative reinforcement. They may end up in bad relationships because it's just what they're used to and they may actually avoid positive ones because they become too unsure of how to handle them. Some people may find themselves being overwhelmed by simple compliments because it's just not what they are used to and they push people away that are positive to them. It's not their fault that they do this - it's just how they have been living for so long.

That doesn't make you a bad person or something. But it does mean that you should start taking steps to try and want better for yourself. At the end of the day all problems in life point to how you see yourself as a person. If you have doubts or major insecurities then you should take steps in getting rid of them so that you can start to enjoy the positive reinforcement that you deserve.

We treat others the way we treat ourselves
and we expect others to treat us the way we treat ourselves.

You have to start treating yourself well and start to forgive yourself for whatever faults you have.