Everyweek I'm trying something new to change my life but it ends up nowhere and its fucking depressing. I'm literally useless...like i can't do anything. Can i even change?

Absolutely! Even though you may not realise it, your brain is changing everyday with every little thing you do (like typing up a new post!). Perhaps to 'change your life' it might be more helpful to break it down into smaller goals. If you did change your life, what would that look like? What might be one small step into the right direction? As an example, maybe it would be 'I want to be skinny' so one tiny step in the right direction is choosing an apple as a snack. It's small, but it matters!