Pep needed one transitional year at City to clear the squad of the deadwood and win the league in his 2nd season. Klopp needed 2 full seasons to challenge for the league and even in his 2nd year he reached CL final. Only at Man United will people convince you that you need 5 years to be just close to challenge for the big trophies.
With 2 proper summer markets, right players bought and shit players sold this summer and the next one, Man United should fully expect to be close to the top by Ten Hag 2nd season here.
Any other thing and yes, questions will need to be asked, like what happened with the previous managers as well.
If by the end of his 2nd season we are still a mere top 4 team, then it means our recruitment as been shit as usual and nothing has changed.