Is Mid the best lane to play for climbing out of ELO Hell?

Mid and jungle are probably your best options provided you know how to control the map.

ap supp

ap or tank supports would probably be your best bet atm.

Just play Janna and autoclimb :^)

Only if you can control the map, hard carry, and focus your team on objectives.

if mid is your best role then yes

otherwise you will be ruined or outcarried by the enemy mid and will blame the jungler and bad teams

jungle is currently the most impactful i believe

There is no elo hell.