Did he get time after 13 or so games from people such as yourself? After he arrived from Southampton? Hopefully so.
Poch career so far is on upward trajectory and how it should be. He began his career at Espanyol and had 2 good seasons and was appreciated as young and good manager. Later he went to Soton making the biggest point tally of the club since Prem and finishing 8th. Then he went to Tottenham who were not a club that requires top 4 each year.
Poch didn't trampoline his career after managing 10 years in wilderness because he played for the club as a player. So far his achievement and development are on merit and making the step up from Spurs to United, Chelsea, City, Barcelona type of club is a natural progression.
This is why he gets time - because he has bought it with performances, with ideas, with team building. And he has done it in one of the most competitive leagues in the world.
When you compare like that - he has much bigger chance to make it at the top club and also the probability that after 2-3-4 years the team would have developed and have clear identity.
You don't give time to managers like Moyes for example because after 4-5 years what you probably get is mediocrity.
Ole so far in his career hasn't "bought" himself time to experiment at a top club for 2-3 years, because if you let that happen you will have much tougher process of getting your team back on top. You saw how many years it took for Liverpool you are witnessing it now with Milan.
Some say we shouldn't fire managers when they are underperforming because we will look like Madrid.
Yes because they are doing pretty bad these last decades doing that don't they?
Also those experiments are pretty expensive. Imagine Ole was "backed" with all those signings he wanted.
Dybala doesn't work out as he is not physically cut for the league or it just is not a good fit. Longstaff proves to be not worth it at 50m pounds. Bruno might not adjust to the league at 50-60m pounds.
Then you have another team of underperforming players managed by a clueless manager, hit the reset button again or wait 4 more years of hovering around the 4th spot Arsenal style just because he has good ideas but none of them are backed with results on the pitch?