I've had 2 stays. First time was in 2012 for a solid 11 weeks in a low secure unit. It was low secure but I was 17 at the time and the adolescent ward was on the top floor with an airlock type entrance. So there was literally no leaving unsupervised. It was fine though, the staff mostly treated me well and the place was maintained to a good standard. It had it's moments and I was miserable but I didn't feel abused or neglected other than one time I was late for my breakfast and so they didn't let me eat my morning meal but still wanted to force me into "education". Education/school was literally at hospital and I was forced into it even though I'd already dropped out of college. Anyway yeah, I sort of protested and just went back to bed and refused to do anything unless they let me eat because it's not realistic to miss a full meal because you were 1 minute late. Otherwise though, there was nobody over 18 y/o so I actually sort of made some friends there, they were like my peers you know, we caused lots of trouble like having food fights, self harming together, standing our mattresses up against doors, kicking magnetically locked doors to get to places we shouldn't. It was a right laugh. but even then, I got discharged, kept in contact with a few people from there, everybody got better except me lol. I always told myself I wasn't depressed but funny I'm the one that just never gets through that "phase" everyone else seems to.
Second stay was just over a year ago for a week before my 22nd birthday and it was in an adult ward in a totally different hospital near me this time. I wrote a huge long diary/complaint thing because over just 7 days I had such an awful experience. I went in after overdosing on xans and hoping to strangle myself and obviously failing because I'm a massive pussy. They treated me as though every single one of my problems were related to drugs and wouldn't listen to anything I had to say. We each got our own room and an en suite shower/toilet but the quality was unbelievably bad. The floor between the bathroom and the room would curl up and ants would crawl in from outside, all over the walls up as high as the lightswitch sometimes, due to my anxiety and already lack of sleep this stopped me from sleeping even more, I would literally leap out of bed while trying to drop off to sleep because I felt something crawl on my ear. Staff were inconsistent, lazy and liars. Half the staff told me there was nothing they could do about the ants citing "it's ant season you know?" but someone else immediately went to grab ant spray and use it around my room.
Nothing was explained to me, I was allowed to leave temporarily whenever I wanted over that week but it wasn't explained to me so I never did. Many things weren't given or explained to me correctly, staff were very neglectful and rude, I had no treatment or therapy of any kind for the entire week. I was sobbing pretty much constantly and only felt humiliated and ignored the whole time. "I can't understand you when you speak like that" one nurse said to me in a sarcastic tone. The final straw that made me try to discharge myself immediately was when the staff were banging and clattering at 1-2am and then lying about it when I question them. I didn't get a wink of sleep for 4 days because of it and they tell me "it's the printer feeding paper" when I can clearly hear metal and ceramic pots being clattered, keys being shook loudly and furniture being moved around on the floor.
I'll try to find the full note I made about my experience but yeah it was bloody awful and I've barely mentioned half of what I felt in there. Essentially there's no way to know what to expect in a mental health facility, depends on the individuals working there. If it's important information btw I'm in the UK.
Here is the full diary thing
https://pastebin.com/bm5Et0xW