Yeah. Thats what I believe too.It's been that way for three years. Repeated injury crises could be due to Ange and Frank not conditioning them properly.
Frank also had multiple injury crisis at Brentford. At the end of the day, they are managers that are responsible for the players. They both failed massively in this aspect.
Though, Ange dealt Frank a bad hand to begin with considering they had spent two years under Ange without proper conditioning or adequate resting/rotation.