Am I being too hard on myself or should I give up completely?

[Neoma]

5. Editing is not writing.

Writing is barfing up ideas onto paper. Take a notebook and just write complete nonsense you think sucks, and just keep writing until you feel like you have something that doesn't suck. Editing is for other people who need capital letters to read letters. When you start writing, you write what YOU like. Don't write to please others. They don't give a crap until they say so, and that's just how it goes. If you like it, that's all that matters.