Because of our so-called fans. Most of them haven't got a clue how to support the team properly. For me going to the game is about singing for the team, cheering, clapping, having a go at the oppo, (within reason, I don't go for all the nasty Wenger/Campbell whatever stuff).
I found more and more I was getting into 'arguments' with our own fans, it was getting to the edge of violence at times, and I'm not interested in that, but of course at the time I won't back down. So it's just not worth it for me. I grew up watching in Spurs in the 60s, and I'm a creature of the terraces. I was never a hooligan though, but to me football now in the UK is sterile far too often, which is why I love 1882, which is trying to do something about it. The lane is over policed by stewards, the fans in general outside a few sections are more interested in sitting and moaning than standing and singing, etc, etc. Also of course, I'm getting on a bit, and it gets harder to drag yourself out the house on a cold winter's day than it does when you're a kid/young man. I used to think nothing about getting up in the early hours to go to some god-forsaken northern outpost in the 60s/70s, it'd take a helluva lot to get me doing that again
Incidentally, last night I hear it was much more fun and like 'old times'. Maybe there was a different supporter profile last night, maybe people just decided football could be fun again, I dunno.
Maybe IF we ever get a new stadium and a different fan profile attending it, I'll start going again. Naturally, assuming I'm still alive, I'll go to the stadium once at least, just for the 'novelty value'.