Every season Arsenal players face injuries and their performance suffers. And Arsenal have not been able to solve this problem even in the last 2/3 years. Basically, this problem will not be solved unless more talented players are added to the squad. Arsenal's starting XI is good and their match strategy is also quite good. However, I would say that until the Arsenal management can strengthen their squad, it will not be possible for this team to dominate the Premier League. Liverpool and City's squads are much stronger and more organized than Arsenal's.
Yes, you're right on that point, but Arsenal can't think negatively anymore, they have to leave that dark past behind, this is their opportunity, they are behind the first place, but the PL still has a long way to go and Arsenal has a lot of potential, they have to work, there may be injuries, there may be internal problems, but this is their golden opportunity to do things right, Liverpool is a team that is giving it all, but let's remember last season when they were first and then City caught up with them and won, all teams are vulnerable, in football anything can happen.
Finding excuses is easy, you can always find an excuse, but that doesn't mean that we are going to see Arsenal win a title, I mean nobody will give them any free three points just because they have a decent reason to lose, they have to do whatever they can do, with whatever they have, and just look for their future. They have a small chance to win the title this season too, in case Liverpool loses a few games, Arsenal could win the title.
However, not only Liverpool looks like they are going to do better than everyone else, but also Arsenal looks like they are not going to win all their games. They could literally end up losing this game against Manchester City and nobody would be shocked about it at all, it does look like a possibility.