You really need to work on your terminology. So you're saying out of 11 knockout ties in 3 seasons where Zidane has lost none, his team won at least 6 of them undeservedly and to top it off he's undeservedly won the three CLs. I welcome you to highlight even ONE tie where the opponent deserved to go through over Madrid. Because in many people's books if you put a wasteful team vs a clinical team, you know which one did their job better.
Your anecdotal graphics and waffling on about luck means absolutely nothing in the long run. Shots, possession and 15,000 other stats won't matter if you don't make it count. Not to mention that suffering through a tie and winning it is a skill. If Bayern were so completely superior, they would've battered Madrid 7-0.
1) You last line is out of reality. Final scoreline does not reflect performance in football many times.
If you don't accept the uttermost fact, realized by many people dealing with this sport, that football is a (maybe the only !) team sport in which NOT the better team wins a game, then i don't see the point in having back-forth in this argument.
If you don't accept that, then maybe Chelsea 2012 was the best team in Europe, maybe Greece 2004 the best NT etc etc etc
2) Thank God, we live at a time when sport statistics has improved dramatically thanks to new technologies. And this means we don't have to suffer listening to every fan's 'interpretation' of a game, distorted through their prejudiced eyes.
We have objective data to MEASURE how good a team was on the pitch. And we measure that by the chances they created, which encompasses all the factors that make teams create chances (individual brilliance included).
So the graphs i posted (which, by the way, are not mine of course. I get them from professional analysts like '11tegen') show the 'Expected Goals' metric or 'how many goals worth' are the total sum of chances created by a team during the game.
This statistic is the mirror of how well a team performed on the pitch. Why? Because games are won by creating chances and not conceding chances. That's the rationale behind creating this measure in the first place. That's what coaches 'teach' to their teams.
When the actual scoreline does not match the expected scoreline, you can say it comes down to three factors only:
i) an outstanding performance by a GK, or conversely a horrifically bad one (De Gea is a good example for this in the Arsenal - ManUtd game last December),
ii) an outstandingly good or bad finishing by a team (Liverpool - Man. City 4-3 in January a good example. Liverpool had better xG by a small margin, BUt only 1.26. They scored 4 by fantastic finishing)
iii) Guess what? LUCK!
the thing is that iii (LUCK) many times encompasses i and ii, and that happens when you cannot pinpoint, with bare-eye witnessing, an outstandingly good or bad player involved in categories i) and ii).
3) So, if we use the above metric to see how deserved RM recent success is, we will see that:
i) 2016: Real Madrid faced minor opposition and took advantage of the easy draw, avoiding teams like BM or Barca that would have kicked them out (Luck creeps in again).
Notwithstanding that, it was evenly matched with both Wolfsburg (!) and City, won the ties by being lucky at the right moments.
Slightly worse than Atleti in the final, won in penalties. And this touches other issues (psychological. Metaphysical maybe?), because we know that Atleti cannot win, even at their best, against RM.
ii) 2017: Deserved qualifications against Napoli, Atleti, and Juve in the final. So, i can give you that overall last year was deserved.
BUT, against Bayern sum xG was slightly for BM, and we have to take into account the refereeing help there. So there is a shadow.
iii) 2018: Clearly undeserved vs Bayern (If you add up the two games' xG scoreline you will end up with RM 2,34 - BM 5.07 !!!!). Evenly matched with Juventus on aggregate, before the referee helping hand again. Vs PSG, overally deserved.
What does that add to? that in the total 11 double-leg or single-leg ties these three seasons you have 5 ties only won and deserved as proved by the stats, 4 evenly matched, 2 undeserved. And we wait to see how it goes vs Liverpool to sum it up.
But so far, we have 5/11 clearly deserved, and 6/11 where you were evenly matched or the worst side.
So yes, the majority (6) you were not the better side based on what you did on the pitch. in many cases you were not the worst side, but the fact that you always won ties in which you were evenly matched by the opponents, adds up to the general feeling of 'not deserved'.
And that's the reason why people are losing their minds on Zidane's luck.
But, that's if you wanna see it as a 3-yr whole.
If we see it in terms of seasons, it is easier to assess: I will give you that you deserved the 2017 one (given also that probably -based on what they showed - none of City, Monaco, PSG, and the other teams that went out earlier would have been able to knock you out). Only Bayern was not worse than you.
But both 2016 and 2018, you were not the better side in most knock-out ties. So, for both these seasons it is undeserved overall.