Arsenal were in a really bad situation when Arteta took over. They were not playing legendary football like in previous years. Despite this, it managed to become very successful in a short time and now appears as one of the biggest teams in Europe again.
There is a similar situation in Chelsea, actually the situation of the team is not so bad but they cannot achieve success. Towards the end of the season, their performance increased significantly and they started not making mistakes. Maybe they'll manage to continue like this next year
Chelsea did well towards the end of the season but it was a bad end for them after they were not given the opportunity to play in the Europa league despite finishing in a position that is deem fit to make them qualify. Chelsea sacked their coach after the season, this was what no one saw coming and have signed a new contract with Maresca, Leicester City’s former coach that brought them back to the premier league after the relegation. I am expecting Chelsea to do better this coming season and this is not something they should joke with to avoid disappointments like they did in the last season. Chelsea needs to improve their performance but they keep failing but after last season I’ve seen much improvement in them and will do well next season in my opinion.