If you pay top dollar to travel to London on a Monday night and watch the shite we've been serving up for years, you can sing what you like as far as I'm concerned, you're a better fan than me.
I basically agree. The chants on Monday were mostly quite funny, in a gallows humour way, and weren't getting on the teams back in my opinion. Also, as others have pointed out, the fans got behind the team as well it wasn't all negative.
Maybe 'We're f***ing shit' is taking it a bit far mind. I was taking a friend from Mexico to his first ever Premier League game, who'd planned his trip around seeing Villa, and found it hard to explain the sarcasm behind it.