Coaches and players don't leave environments if they are happy and well supported for the best chance for success.Dana left and was not driven out. He wanted Houston as a place to live more than Morgantown and thus WVU would've needed to do far better than 4mil/year guaranteed for 5 years. Dana is not, and never was, worth that kind of money or commitment.
It's like a job. You could be in a shitty job where you are abused, but it's always there. You leave to start your own business or work at a small start-up. The latter job could go under, but that doesn't mean that the right answer was to stay mired in the abusive job.
The right answer is to try for something better knowing that you might fail and will likely have try more than once to get that improvement.
If WVU had shown him support instead of hatred from before he took the job, he wasn't going anywhere. Twice they held up or lowballed contracts to him and often his recruiting efforts took a hit as a result. if it wasn't that it was the hit pieces in the WV media and social media attacks--all unwarranted, mostly because he took over for a coach hired after one win when RR left the team a week before the bowl game.