Hi Panda1234 and welcome to pc.
I am not a doctor so it is not for me to diagnose you but it does sound like severe depression to me. It may be helpful to see a psychiatrist, or therapist. There is a depression test you can take on this forum. You may want to look at it. And I don't think you are stupide or lazy. Another thing depression does is make you feel bad about yourself.

Hoping you get some help and feel better soon.