Yeah okay, I also wouldn´t just block whole IP-Ranges, but Google does.
That´s the problem with the Big ones ... they can do this and they don´t give a damn thing if it is affecting others, innocent users as well. They just don´t want to pay people who are sitting there and checking everything by hand. They are using an automated service which is using an algoryhtm to decide if the traffic that´s coming in is good or bad traffic.
I, and surely quite a few other users opened Tickets with the Google Service and almost all of them are closed with the same answer: "There is malicious Traffic from your network, that´s why we are blocking it. please contact your provider/hosting company" and Hetzner says "We can´t do anything about it, it´s Googles Task"....
In the end the honest users are the ones which are suffering and are forced to find another solution.