Definitely forgot the City game which I'd agree on.I get what you're saying, I suppose it's just a matter of opinion.
Personally I think both Spurs games and City away are games where we were lucky to get a point. There have been plenty of others, from Watford on the opening day of the season to the same team on saturday, where we didn't necessarily get more than we deserved, but we couldn't really have argued if we'd lost the game. We were a Joel fingertip away from a 4th straight defeat this weekend, and it wouldn't have been down to bad luck if we'd lost.
Fans are naturally predisposed to remembering the things that have gone against them, and believing that their performances deserved more. Speak to a Norwich fan and they won't talk about how we blitzed them in the first 45 minutes, they'll talk about how once it was 1-1 they missed the best chance to fall to either side which would have won it. I've used the example of the palace game before, we think we played really well and remember us hitting the woodwork a couple of times, but my mate who's a palace fan remembers them hitting us repeatedly on the break and having a blatant pen not given. Same game, different viewpoint. Similarly, we think we deserved to beat West Ham because we were 2-0 up late on, but we also think we deserved to beat West Brom despite being 2-0 down at the same stage. You can't have it both ways.
I certainly don't think we're destined to get worse, but it's a perfectly understandable point of view to think that a team which has been slipping down the league for 2 years is going to continue to do so. Particularly when performances have been getting worse recently. I'm sure Villa fans thought they'd eventually sort themselves out when they slipped from 5th/6th down into the bottom half, but it never happened. We'd be foolish to think we couldn't go the same way.
Villa are a scary example but as much as it may sound blue tinted I think we are much more stable behind the scenes. I don't think many teams plummet like that unless they're badly managed at all levels.