Ultra durable MTB for heavyweight rider (370lbs)?
As you probably know specific product recommendations are off topic here. However, three recommendations:


Overbuilt wheels, heavy duty rim, 44 or 48 spokes.
The biggest tire you can run, especially on the rear.
Consider a full suspension bike. A 90kg rider coming off a big drop is going to generate as much force as you will going over a pothole.


Props for your efforts to keep riding.