I have no problem upgrading to marshmallow, but you never recommended that I should until now. In fact quite the opposite.
not realy,if you have read some previous pages . you should have seen about the downgrade issue.
you said you downgraded and everything was normal and you was fine.
you downgraded without asking too but you do what you want with your device.
reacting to your comment i thinked,no need to break something that is not broken.
i even said "no help needed"
advice,document yourself first and read.
poeple will not allways document you all the time and do stuff for you.
especialy if you behave like you dont need help and does things yourself .
it is your device after all.