That's two different things.
Saying a club can do no wrong because you support them is obviously retarded. So much that I'd be surprised if anyone ever did that.
Following a football club no matter what is not cultish, that's literally what being a fan is. Being a fair weather fan is the opposite, only supporting them when they are doing well.
I think the problem is that some people just like to say things are shit, others not so much. And we all have different views and reasoning. Some people here lunge from one extreme to the next on a game-by-game basis. Up and down like a tart's knickers.
Ultimately no one is holding a gun to your head to sit and watch the team play if you really don't want to do it, there are plenty of other things you can be doing. You can come back and watch again when the team is doing well and playing great football, but accept that you are going to be called a fair weather fan. Not aimed at you or anyone in particular directly, but I'm sure people can figure out what they get out of supporting Juve or a football team, sports club, etc.