Hey,
I completely relate to what you are saying, My boyfriend was a law graduate and working for hiscox when he was introduced to crystal. He became a heavy user of crystal meth and G for a year, he was also a very prominent part of the south London gay clubbing scene.
And as you say I have never seen a drug like it. It destroys people and there brains in a terrifying way.
I remember being knelt on the floor with his head in my lap after an overdose on G in a run down lock up.
I thought there was no saving him but I stuck by his side, to the point where both of us (originally being comfortable middle class people) ended up being homeless even though I never used I refused to leave him. I just kept believing and telling him I believed he could get better even when part of me really thought I couldn’t save him. Even now 3 months into his abstinence recovery he still shows episodes of slight psychosis from how the drugs ruined his mind but these episodes are getting further and further apart and he is getting stronger.
And is so appreciative and shows no signs of ever going back.
We moved out of London and cut all ties from anyone from our past.
It can happen people do get better