They have 6 9 win seasons and 15 8 win seasons in that same time (but only 7 8 win seasons in the last 50 years). Which means their 8 win season last year is already good enough for top 25 all time, and top 15 in living memory.
So yeah, the schedule isn't great, but Virginia's football history has got to be one of the worst of any P5 school in existence. Bronco in 3 years has Virginia succeeding about as well as they ever have.