I don't hate Den-O, but I wouldn't say it's awesome. The early episodes are rough to get into to, but it can be just silly fun. Human characters needed to be improved, and those two dip-sticks from the Milk Dipper needed removed altogether. But it could entertaining.
I find it funny that Kiva's so worshipped, worshipped by the same people who condemn Den-O, when it was really just Den-O dressed like Castlevania, only there was nothing entertaining or fun about it.