Arsenal is hard to compete with other clubs, their players are upset, some wanna leave the club, they do not have big guy to calm them down and reunited them
the player's squad they have is good, they just need a new manager who can change their style of game to be able to compete with other favorite teams. I'm sure if Arsenal brings in a new manager they will certainly be able to compete to win the Premier League title this season at least they managed to finish in the top 4 positions.
Depends on who is the new manager and how good is the manager to manage Arsenal because changing the manager is not a guarantee that it will bring more success. Look at MU after Fergie retired, they have changed the manager several times but what is the result? Nothing, and now MU with Mou is starting to be a better team this year. So dont hope too much on a new manager to change the situation.