I completely understand and relate to your feelings!
I also started watching the show as a neutral viewer. In fact until Sukirti's eviction i did not even watch BB8 that much and started watching regularly from then onwards. There was something in Gautam which pulled me towards him and it did not take much time to become his full fledged supporter. He was and I will say still is THE BEST housemate. He has a few negative points but so many of his positive points override all the negative ones.
However, Gautam-Diandra angle has become increasingly difficult for me to watch and this past week, after a few days of absolute hating their PDA I find myself strangely detached to the whole idea of Gau-Di together. I still abhor them as a couple but I think I won't stop watching the show. In fact I am feeling kind of relieved that the pressure of supporting Gautam all the time has been lifted off my shoulders lol. I don't know if I am making sense but what I am trying to say is, I can view the show again with neutral feelings now. I used to take a lot of stress and feel sad for Gauti whenever people were mean to him inside the house and was always anxious about how what can he do which will make turn his image in their eyes because honestly he is a gem of a person. Now, I can watch the show without these kind of unnecessary tension in my head.
Gautam is still no.1 for me for the win just like you but thanks to his attachment with D, I think I can also concentrate on other housemates who I find entertaining as well as pleasing..like Pritam, Dimpy and to an extent Sonali and Ali too.
I am not completely giving up on Gautam, but as I said I have become slightly less passionate about supporting him at this point in time.