I was also incidentally very depressed as a teenager (my parents divorced due my father's drug use when I was 11, I was moved to a new village just outside the city I had lived in away from all of my friends, went to a strict Catholic school not knowing anyone at all and missed the first three days of year 7, realising I was bisexual by the time I was about 12 and felt deeply ashamed and like there was something fundamentally wrong with me, raped at 13. Bullied by both and teachers. By 16 I was suicidal, self harming and smoking a lot of weed (self medicating in hindsight). I was hanging out with a few seriously shady people and regularly getting very drunk /high.
I left school and went to college. Found a new group of people who were just better people all round, escaped the bullying and the drugs and alcohol. Had some counselling with the college which made me realise I wasn't just an awful person and it wasn't all my fault, and that I deserved to be happy as much as anyone else. Met my dp.
My mental health skyrocketed and suddenly I was able to put the energy into keeping both myself and my environment clean and tidy.
I don't judge when I see rooms like this, my heart breaks for the people they belong to.