I'm a very nervous person, social anxiety, depression, paranoia and taking meds but I still feel like everyone around me thinks I'm a terrible person and I feel like I deserve it.

I know this kind of negative thinking won't help me get better, but I don't know how to stop it. I feel like an inherently bad person for no real reason.
My personality is deteriorating and I need some help to make me feel like a real and happy person again.

Any advice on how I can reassure myself I'm a good person?