I don't think anyone says the team doesn't need to deliver. However, using one-off games in knockout competitions is not the best metric since there is a ton of luck that comes into play. If any of the 10 outfield Villareal players missed their pen, we would've won a trophy. Equally, last season Martial made Sevilla's GK MotM. Is that really Ole's fault?
The obvious progression from 6th, to 3rd,to 2nd, with a fantastic squad that is harmonious, young and full of potential, are all things Ole achieved and did not just inherit. Instead, we had Shaw, Martial and Rashford rumoured to want to leave, the club spiraling down in form and in the table and the whole squad in disarray, noticeably not giving their all.
Inverting the question, who would you have instead of Ole, why and what do you expect would change?