Agree with that though another way of looking at it is we've had a fair share of good luck at times, not sure if you'd say that's been counterbalanced by the same degree of bad luck.
Like with Palace missing a pen that would've had us 1-0 down, we then go on to score in the last minutes to get the win. Or just this weekend the ref not giving what seemed a pen against Coleman to me. Think Mina got a bit lucky not to give away a pen for a foul on Morata against Chelsea too.
Yeah, good points there. Just to extend the conversation slightly further, I'd say Jags shouldn't have been sent off. Richarlison was sent off (rightly or wrongly) for something that lots of other players haven't been sent off for. Martial's penalty was a good tackle, Smalling should've been sent off, Lacazette's goal was miles offside, Jorginho should've been sent off, Alonso probably should've been sent off.
I'd also say Pickford saving a penalty isn't necessarily luck (but I do see what you mean that it could've gone in and changed that game).
In terms of things that are in our control that we could've done better, Bernard's tripped over his own feet twice with gilt edged chances, Walcott's missed a few sitters/miscontrolled good chances.
I'd say overall, we've probably got less points than we should have, given the performances and the way the games have gone. Even our worst performances against West Ham and Huddersfield, we probably still should've beat Huddersfield on balance, and West Ham scored 3 out of 4 attempts on goal, and we had 16 attempts.
I suppose what I'm saying is that we're right in the mix for Top 6 if we maintain and hopefully improve our performances across the season. If we could add a quality striker, I think it's do-able.