Ronaldo can't be the only reason for this. There are 10 players on the field, not one player. Ronaldo can't win the games by himself. Maybe he is done with big football. It's time for him to move into a smaller football club or just retire.
I'm really impressed with Arsenal winning against Chelsea on Stamford Bridge. Arteta somehow found the right way to achieve consistent performance from his players. Winning matches like this one is the path to the Premier League Trophy. I really hope that the Arsenal players won't suffer from the "spring curse"(having many players injured during the spring).
There is nothing wrong with Manchester United, they are playing fine football and winning matches. Why they lost weekend match is that they don't have replacement for some players. Players like Varan and Bruno has no replacement. By January if ETH will sign two defenders, one midfielder and one striker, Manchester United problems will be all over.
Arsenal is doing great and I support them for doing great. I was happy when I saw Saka in the line up after the rumors that he was injured.