That's not correct. If below is not "breaking new grounds", I don't know what is. His winning percentage alone makes him a legend in Bundesliga. There's a reason why a ruthless club like Bayern didn't want him to leave while showing Ancelotti the door after the 1st season, not even tolerating treble winner Flick, firing Nagelsmann before the season end and now Tuchel.
"He won 82 out of 104 games, a win percentage of 80.4 which destroyed that of his closest challenger, Ottmar Hitzfeld (58.4%)."
"Guardiola’s Bayern scored a record 254 goals in 102 league matches while conceding just 58. They also kept 59 clean sheets - another record."
"His side also set a record for earning the most points in the first half of the season, taking an astonishing 47 from a possible 51. "
"wrapping up the title in March 2014 after 27 games, setting a new record for the fastest Bundesliga win and finishing the season with 90 points, 19 ahead of Jurgen Klopp's Borussia Dortmund in second."
"Since the Catalan swapped Bavaria for Manchester, Carlo Ancelotti and Niko Kovac lasted little more than a year."
www.goal.com/en-us/lists/guardiola-didnt-fail-bayern-munich-not-winning-champions-league-man-city/bltc3b576b91f22d2b6
Same can be said for SAF's UCL track record, they completely dominated PL, but showed just above average performance bar a few exceptional seasons considering his long tenure.
Pep's teams never got dumped out of the group stage in the CL like SAF's United in 2005 in a group with Lille, Benfica and Villareal finishing last. In 2012, United went out in the group stage again behind Basel and Benfica. These are way more embarrassing than any QF or SF Pep lost.. Obviously, we don't hear any mention of these here. Imagine Pep's team failing in the group stage and the type of posts we'd see here.
I didn't see anybody talking about United's failures against teams like Goteborg, Galatasaray etc. in the 90s under SAF either. Multiple times, United got eliminated in the 2nd round in the CL right after the group stage as well. And, I forgot the number of times United faced early elimination against Real Madrid under SAF, probably 3-4 times.
You also don't seem to be aware of a lot of information posted in the above link about the mishaps Pep's Bayern experienced in the CL.
--Against Barca, " Arjen Robben, David Alaba and Franck Ribery
all missed both legs, while Robert Lewandowski played while wearing a mask after breaking his jaw."
-- Against Atletico, " losing out on away goals to Atletico Madrid in the semi-finals after Thomas Muller had
missed a penalty and his team had 35 shots, 12 on target"