Amazon looks like it might be a good series. It has some silly elements, like the "koo koo" sounds Amazon makes in his Rider form, and the overall ugliness of the monsters, but also some cool elements.
I like the fact that Amazon bites and dismembers his enemies so they bleed.

If Amazon is going for the title of "most violent Rider ever", though, he has some competition from Shin Kamen Rider, who was also a fucking brutal fellow.
This is the only series I've seen so far to handle the "jungle boy" trope intelligently. Gekiranger turned it into pure comic relief, and Power Rangers: Wild Force used the trope... well, barely to any effect at all. Amazon, on the other hand, really
is a savage, and has trouble simply learning to talk, as he well should have.
I will be watching this. Keep up the good work.
