I don't genuinely think winning in Europe is a rigid measure of a manager's 'genius'. Is Sevilla a dominating team then?. More often than not, the defensive hit and run teams have greater success in UCL and they call it as 'tactics' crap. Its been a while since UCL was won by a dominating team. Lets look at the last few UCLs for example,
Liverpool - Madrid (Liverpool was the better team, until Salah was taken out and Karius happened)
Liverpool - Tottenham (Tottenham was the better team. Liverpool got the penalty, sat and countered)
Bayern - PSG (The COVID era, where Bayern played one-off games instead of double headers to reach the final)
Chelsea - City and Madrid -Liverpool (Same thing. Chelsea and Madrid were poor, but camped and countered the dominating teams). Are any of these winners dominating?
The point is UCL is a great one-off showboating for a club, but definitely not a real measure of great team. They should rename it as a Champions cup instead of League. If anything, it should be reduced to a cup. Real Madrid have been bang average year in and year out, but manage to win the cup. Same with Sevilla, bang average but win the Europa. Its ridiculuous to suggest these are great teams. Take 2005 Milan- Liverpool, just because LIverpool won the final, can we say they are the best team out there. If a team does the double, then yes we can say they were truly dominating (like the old cup winners cup kinda). To keep saying Pep hasn't won the UCL recently doesn't make him any less of a manager than say Tuchel/Klopp/Mou/Ancelotti et.al.
Also, I don't agree that City were dominating before Pep analogy. City were good, but never dominating. Pep has destroyed the league. 90+ points season after season is not normal for any team in any era. Almost all the great managers in current football were stacked in PL (Tuchel, Mou, Klopp, Ancelotti, Conte etc. ) and Pep has still been dominating. I am certain but for Pep, any other CIty manager, both us (under Mourinho) and Pool (under KLopp) would have been in with a shout for atleast few more titles. His impact will be better felt once he leaves. Am certain, it will be status resumed for City, scrapping one or two titles every 10 years.