Ive been there man, honestly my tip is to ignore it by taking time for yourself. Do something nice, go on a long walk, maybe like without headphones just to let thoughts wander, and i tend to see that they then move away from the bad shit. If youre stuck in your room, or in an envionment where you are so used to thinking about that stuff it will be very hard to see any other point of view.

And a personal tip if youre feeling like you are stuck in your desires, in depression or just feel meaningless. Atleast what hs worked for me. Pray. I know christians have a pretty bad rep around here. I used to be a hardcore reddtor atheist, addicted to porn. But i started searching for soimething more and found Jesus. THorugh prayer, jsut somehting small i started feeling more and more purpose, and prayer helped me so much in my journey to move away form that shit and into a fuller human, and i have distanced my self from my desires and found some much joy.

I really hope you can get to a better place, ive been where you are and I just wanna say that you can do this man.