Very sorry to read your litany of woes.
My M3W and I also went through a simular journey of torture and frustration.
It's such a shame. Having my 2012 M3W was a dream come true only to end up as a nightmare.
But at the end of it I had been smitten by the four wheel range.
Anyway I wish you happiness and success with whatever your next fun car turns out to be...good luck..and sorry to see u leave TM.