in a word... no
Some people learn to cope with it, but it never leaves them.
Mostly that's what medication for depression is all about - enabling the sufferer to cope through the worst whilst they learn to manage their condition with stuff like cognitive behavioural therapy. That's when medication should stop - it's a crutch, not a long term panacea to the problem.
Much of the time there's a massive dislocation of responsibility that has to be overcome. But I'll say this: if people don't want to get better, then no amount of help or sympathy will be appreciated, in fact it will often result in them attacking those who try and help - by that I don't necessarily mean a physical assault, but verbal, emotional, psychological aggression directed outwards at anyone but themselves.
But it all depends on the person and the severity of their condition.
Also worth saying; any help on the nhs will take years on a waiting list for diagnosis and treatment, in the mean time medication is given, often long term because there's nothing else available. Unless you can afford private treatment or are deemed a danger to yourself or others you're pretty much left to get on with it.
That is rather subjective and I think it quite fair to say wrong on many accounts. Not to discount your own experience though.
Some mental health diseases can be cured, some can have their symptoms alleviated, some are totally untreatable. Like any other disease. If one was to ask whether anyone had ever recovered from physical trauma a few people would raise an eyebrow - we all know you get over an abrasion and don't do so well with decapitation - to separate mental health disease as being something from physical disease is one of the big hurdles as it is a barrier to not only people accepting that they have something wrong but also how sympathetic society is towards them and also the position, exactness and efficacy of the professionals in that discipline.