Pogba has spent the huge majority of his time with us playing in a two man midfield. Nobody is going to pull up those kinds of numbers in that position. One of the few times he was given a proper run in a similar position as KDB plays he put up similar (if not better) numbers. We'll never know what he could have done if we'd used him there long-term as for some reason both Mourinho and Ole kept him mostly in the deeper role.
The 'needing 7/8 WC players' thing is overplayed as well, as he was regularly our best player during any periods where we actually played properly as a team. Something that we all know was quite rare under Mourinho and hit-and-miss under Ole. Maybe he does need true world class players around him, but it's much more likely that he just needs a properly functioning team.
I'm afraid your memory is playing tricks on you. I wouldn't have remembered correctly either but I checked the line-up in each game on Transfermarkt. Out of his 105 PL starts, 61 were alongside two other recognised central midfielders, 44 starts playing in a two man midfield. For CL matches, the breakdown is 9 starts with two other central midfielders on the pitch and 3 starts in a two man midfield.
During Mourinho's first season, Pogba started 19 PL matches as part of a 3 man midfield, with two from Carrick, Fellaini and Herrera, providing support. He scored 4 goals with 3 assists in these matches.
In Mourinho's 2nd season, I've so far counted 10 PL matches in which Pogba played in a midfield three, typically Matic + Herrera, but Fellaini and McTominay also featured on occasion. I've not included the unsuccessful period when Mourinho used Pogba and Lingard as no 8s ahead of Matic. Anyway, 3 goals and 2 assists in those 10 PL starts with three recognised midfielders.
In the Mourinho/Solskjaer season, Pogba scored 13 goals (including 7 penalties) with 9 assists in 3013 PL mins. In 31 out of 34 starts, he played in a midfield 3, typically alongside Herrera and Matic but Fred, Fellaini, Pereira (used in a deep playmaker role) and McTominay also featured at times.
So far this season, Pogba has started one PL match with 2 other central midfielders (Fred + McTominay in a diamond system against Arsenal).
De Bruyne has had 3 seasons for City with superior figures. 14 goals (including 2 pens) with 20 assists in 2818 PL mins last season. 8 goals with 16 assists in 3103 PL mins during 2017/8 and 6 goals with 18 assists in 2893 PL mins during 2016/7.
Elite no 10/attacking midfielders typically average about 20 non-penalty goals + assists in an almost full, 3000 mins PL season. Ozil, Dele Alli, Eriksen all delivered at this rate on average. Bruno Fernandes currently has 7 non-penalty goals + 10 assists in 1785 PL mins since joining United.