Arsenal have had several chances this season to close the gap between them and Liverpool, but their inconsistency has made them not make use of these chances, which has made it difficult for Arsenal to catch up with Liverpool in the Premier League table this season. If Liverpool should lose 3 consecutive matches now, they would still be topping the Premier League table, and no club in the Premier League can overtake Liverpool in the Premier League table, so Arsenal should focus on winning their matches to maintain their 2nd place in the Premier League table and leave catching up with Liverpool because it's not achievable this season.
This problem has been haunting them not only this season, it is their main problem, which hinders them every time. The champion is the team that goes through the whole season without any declines, or almost without, and it happens that Arsenal always has this, even it would seem that their main rival is City, but when City had their worst season in recent years, Arsenal again could not take advantage of this because Liverpool turned out to be better than them.