Arsenal have spent a lot of money in the last few seasons to build their squad but they have not been able to win any major titles and that is clearly a failure. If you look at the game graph, The Gunners have always been able to improve but mentality is a big obstacle that makes performance inconsistent. And in my opinion if this season fails again to achieve achievements then Arteta's position deserves to be evaluated and it is very possible that a change of coach is a must for the sake of the big target to be achieved.
You’re right. Arsenal have not been winning trophies but building a team to the level to be able to compete for every trophy and most especially European trophies as Arsenal have been mocked for all the time, this process takes time and I feel Arsenal are very close to achieving that level when Arteta signs a prolific striker. The defense is good, midfield is okay, just a few pieces to add up and Arsenal will be good to go.
Their loss against Newcastle was unexpected though, with their current form and all the wins they have had facing tough teams they still lost to Newcastle not scoring even a single goal. Well, I guess that's what makes soccer fun and entertaining, Any team can win or lose, that's why it's hard to predict. Personally this game cost me a lot of money because my prediction was GG, but I was disappointed with the result. If they can't withstand Newcastle then I don't think they'll be able to play well against Liverpool, but let's just see what happens.