I had this problem (prob still have it). There may be an underlying issue. Mine was parents and friends being overcritical of me. Made me hypersensitive. Now I block out all their negativity (as best I can). Now that I'm working every time I get criticized I try not to take it personally and if I tried my best that's enough. This takes time and practice though. Try clearing your mind next time you hear those voices. Don't let them bring you down and see if you feel better. Then just keep trying that. If you need to talk more about it come here or you can msg me I have some experience with this. Also you're not worse than others. Those others just need to bring you down so they don't have to build up. They prob have the same feeling down issue but choose the easy way out.