I don't know about Sweden, but inpatient psychiatric care in Denmark has been critiqued for an excessive use of force restraint. Furthermore, from what I've heard the purpose of inpatient treatment tends to be that of assessment rather than treatment. They only keep/medicate you until the point when you no longer represent a clear and present threat to yourself or the public, Why? Because hospital beds are expensive compared to various forms of outpatient treatment. As such I'm not surprised that the OP received little in the way of effective treatment in various psych wards. Merely appalled by the callous attitude exhibited by the staff and the lack of effective outpatient care.

Dear OP, I'm so sorry that you had to go through that. I rarely use the term hellish, but your teenage years definitely qualify as such.

Here's my story...

32 f, Danish, diagnosed with childhood onset, somewhat treatment resistant, moderate to severe OCD, mild social anxiety and recurring depressive episodes. My first brush with state funded outpatient psychiatric care was at the tender age of 14. Five years later I resumed treatment, which remains, even at present, an ongoing project. While I'm eternally grateful that the welfare state allows me access to free psychiatric care, it's definitely been a mixed bag of nuts.

1. Outside the two major cities in my country, there's next to nothing in the way of access to effective treatment of OCD (proper, up to date, cognitive behavioural behaviour therapy). Why? Because the relative quality and quantity of local mental health services is determined by the priorities of local government in conjunction with the wealth/taxable income of the area in question and the perceived needs of its' inhabitants.
   

I was raised in the sparsely populated, low income, sticks, where OCD is a fairly uncommon disorders compared to, say, various forms of depression. Meanwhile, people with OCD are rarely violent and, as such, represent no threat to public safety. Thankfully I moved to the capital as a late twenty something. I try not speculate about what might've happened to me otherwise. Odds are 1:2 that I'd be dead.

1. Psychiatry is low status within the medical field. Hence there's a lack of qualified and truly capable mental health care professionals.

I've definitely had my fair share of incompetent psychiatrists. 3 out of 4. That's the current score or, in other words, EVERYONE but my current shrink. On the whole I've had better luck with psychologists. Unfortunately, I need ze drugs (a high dose SSRI coupled with a low dose anti-psychotic mood stabiliser) to function, so the latter is of very limited use to me without the assistance of the former.