But those are specific circumstantial and isolated cases. Some taken from a season which had a volatile pecking order. In some cases you are right though, the driver made the difference. The Spain 2024 as an example, where it was Lando's fault for not being perfect on the start.
However you have made extrapolations for other races based exactly on the same points I made that you said "nobody mentioned". Somehow you don't see it even though it's right there on the first example.
You say Lando lost Qatar 2024 while having the fastest car. What exactly makes you say that? He didn't get pole, he didn't inherit the lead of the race at any point and he didn't have a faster average pace than Max in the race either. Why is McLaren evaluated as the fastest car there, when every piece of data has RedBull/Max ahead?
Same thing for Cota 2025. None of the McLaren drivers were close to pole. Oscar was nowhere, but Lando was fighting with Leclerc and edged slightly ahead. Still 3 tenths down on Max. In the race, Lando lost out in the start (his fault again), while Max cruises to an easy victory. But somehow you consider this a race lost by Lando and not a race won by Max? You've literally said it before, you believe that drivers in the lead hold off pace and don't push, right. I suppose this is not valid for Max in Cota?
In any case, this becomes a pointless back-and-forth because it always boils down to some very one-sided views that you will always refuse to budge away from. I can respect that, it's your right.
Therefore, you can conclude that Mclaren drivers need more of a performance advantage to make winning look easy than some other drivers on the grid
Depends on what sort of gap you start considering a valid car advantage and what is just "noise" going from session-to-session. What McLaren had in the first part of the season, was a legitimate significant advantage. With that, their inperfect drivers won everything except 3 races. Everyone would consider that an "easy" run of victories surely. Beyond the second half, with the exception of Mexico and Brazil, there was no tangible advantage McLaren had over RedBull/Max. There it became a matter of the best driver winning (with just random spikes going both ways on some sessions). Of course in that scenario one would expect Max to win the most.
In any case, the sport proves me right. If you have a legitimate car advantage over your rivals, winning becomes trivial.
It was so easy for RedBull in 2023, 2013 and 2011.
It was very easy for Mercedes in 2014-2016 & 2019-2020.
It was very easy for Brawn in the first part of 2009 until others caught up.
etc ...