If hostel systems work,why do so many end up back on the streets.

My apologies for ranting about time spent in the  hostel system but in my opinion it was 6yrs of my life wasted.6 years where I had to have a keywork session with a moron every week and awnser the same questions over and over again.FFS how long does it take to asses someone and see if they are suitable for housing.Im of the opinion its a deliberate conspiracy to prove to society how essential they are in the rehabilitation of poor unfortunates like myself.Only thing is Ive never thought of  myself as unfortunate no matter what apart from the times I had to sit and listen to all their fucking crap.I put up with it because I wanted a permanent place of my own without them having acsess to my room or supported housing unit so the nosey fuckers could snoop while I was out.I often used toleave little notes for them to find but only offensive ones.They couldnt say anything about this as they shouldn have been snooping .Its a fact if I had a key to their houses and did to them what they do to their residents I would probably be branded a pervert and locked up for a long time.In a nutshell hostels dont work as most residents end up back on the streets or are kicked out for raising hell about their draconian rules.