I worry that nothing is ever good enough for me and I will spend the rest of my life feeling this way.
What do you imagine your future looks like?
I fear my future is not bright.
I'm sorry you're feeling that way.  I think it's healthy to try and work to make your future brighter!  You have the ability to make the necessary changes starting right now.
I'm going to spend all night scrolling through social media.
Social media might only make you feel worse about how you feel about yourself. It is good to want your future to be better, but you have to want to change it. Look for things that inspire you or make you feel better about yourself.