I feel that overall Bernie did a great job for F1 over the years. For those of you that are younger than me (that is most of you!) it is now inconceivable to believe that until 1976 F1 was not regularly televised. Bernie was responsible for getting it to be so big.
Although it has lost its way in recent years and there is a lot more entertaining motorsport, I think F1 lost its way when technology was such that cars would go faster than people could drive them. Then a lot of innovation; e.g. Turbos, anti-lock braking got removed and engines became ridiculously small.
Just my view....