I do really stupid things which get me in trouble...like covering my hands in paint or nail polish and scratching the paint off the fire.Is it me beighnt "bad".Also,has anyone else been bullied.I now self-harm and am ED-nos (eating disorder not otherwise specified) because my self esteem is so low.I have no friends whatsoever.is it me and everyone seems to hate me or is it just everyone else not understanding my difficulties?
It is the combination of you and everyone else. It is most likely them not understanding you plus you not understanding them.
It took me years to realise that. I knew that no-one understood me, but I didn't know that I also did not understand them.
That meant there was virtually no effective communication happening.
The habits you describe sound like 'external stims' for want of a better description.
Some stims involve moving our body and mouths, but if that doesn't happen, or has been prevented, then stims can become external like picking at something, or scratching something.
Self harm is addictive and a very dangerous stim. Get help for that if you can.
It is really hard to make friends, I don't know if you want to try making friends online, but that is easier.