Both Roth and Hagar were good. At the time when Roth left, the thought was the band would suffer. Then came Sammy.
>>Both Roth and Hagar were good.<<
Not really. Roth was a showman but a terrible vocalist. Hagar could actually sing, and sing well.
Roth has hated Van Halen after the brothers kicked him out — mostly for bring a d*ck.