Anyone agrees that Gantz goes too far with its fanservice

No, the essence and the taboo of Gantz is playing with sensitive and controversial topics such as

The scene where the homeless are brutally beaten in the park, or the scene where the grandmother dies with her grandson in her arms, etc.

The point is that sexualization, gore, and violence are what give Gantz anime/manga their identity; without them, Gantz wouldn't be Gantz.

There's no such thing as too much, you don't have to keep watching if it makes you feel unconfortable, though!

Kind of figured it was meant to be gross and uncomfortable by design to be honest. 0o;

hell no, the odd feeling it gives you is part of the experience, Gantz is perfect (except for the vampire/ESP plotholes)

Yes i agree, While i think the intention was to give it more disturbing shock value simaller to its gore and other dark topics, it doesn't really make you feel more disturbed or immersed, just uncomfortable and questioning the standards of men in gantz.

For cover pages, yeah so much unnecessary goon baits but for actual chapter there isn't something very annoying except that dog licking things

(spoilers) Yes. I think the violence is done tastefully by showing the brutality that comes with war, and the brutal gore of it all is an important part to the central theme of Gantz, but then rape is just kind of treated like a joke. Their is literally a character who just rapes the aliens, and then that's it. That's like his whole thing. There's no good commentary or messages behind the fanservice, and the author just seems like a pervert. The manga literally opens in every chapter with random half naked girls, some who aren't even in the fudging plot at all. Reika basically creates a Kei as her lover, forcing him into a position where submission to her is his only option, which then kind of just forces them together (argueably SA). The dog scene kind of solidified it for me early on that the author is just a weirdo creep. Honestly made me really dissapointed.