I agree that Manchester City season is not going as well as they wanted because they got eliminated from Champions League and it is unlikely they will win Premier League title. Now it is best to accept how things are and focus on finishing in top four so they can play in the Champions League again next season. Since winning Premier League title is no longer possible Manchester City can focus on FA Cup and Club World Cup which they still have chance to win. Winning one or both of these competitions would be nice prize and would help boost team spirits. As you said next season Manchester City will probably come back stronger and play better.
Manchester City's very inconsistent performance this season has meant that Manchester City cannot meet the expectations of many people who at the start of the season predicted that Manchester City would remain a strong team and continue to compete strongly in the Champions League and also in the Premier League. But what is seen now is just the opposite. Manchester City is now only able to compete for the top 4 in the Premier League and in the UCL they have also been eliminated. And yes, the only remaining hope may be in other domestic competitions that Manchester City is still participating in, such as the FA Cup, one of them. And I'm pretty sure the chances in the FA Cup for Manchester City are still very big.