In the past five years, Pep Guardiola and Manchester City won the Premier League title more than any other club in the Premier League. If Manchester City's performance is declining now, it's not disappointing because Manchester City has been at the top for a long time, and it certain their performance will decline one day, which is happening now. A lot of Manchester City's key players are injured, and I believe if those players return to full fitness for Manchester City, Manchester City's performance will improve greatly this season.
It won't be easy to return to previous form even if key players recover from injury. Manchester City is not only struggling with injuries to key players, but several other key players are also missing, making it difficult for Manchester City to make a comeback under the same manager. Next week, the Manchester derby will be another one, and I expect it to be a close match for both teams, as United haven't been at their best this season, so City will need to play their best to avoid embarrassment in front of their own fans.