There is nothing negative about Nadal having won 13 Majors on clay.
One of the most insane and frustrating aspects of the GOAT debate with the 3 headed Fedalovic beast is that so much becomes a zero sum game. Denigrate , tear down and bash what the player you don't favor has accomplished. Roger has *only* 1 French Open. Rafa has *only* 2 Wimbledon titles. Novak has *only* 1 French Open and so forth and so on.
All surfaces are standardized until they are not. Then it becomes you are one dimensional, etc, etc.
FWIW , I love grass court tennis but this whole canard that grass is THE surface that exemplifies most tennis skills is once and for all a Federer uberfan pseudo axiom. When Sampras was
the dominant player and won a bushload of W titles the complaint by Sampras nonfans was that grass was too boring , 2 strike tennis at best, and yes ONE DIMENSIONAL and that Sampras serve was too much of an advantage. Insanely Before that, Bjorn Borg , who won on both fast slick Wimbledon grass AND slow as molasses red clay at Roland Garos (did the double F0-W 3 times) was bashed because he could not win once the USO on HC, never mind that what he did do was incredibly difficult. HC was a *medium* surface that best exemplied tennis skills, etc. And of course even today some pundits and players claim that the FO is the most DIFFICULT Major to win because of the skillset needed to win there. Edberg, McEnroe, Connors, Sampras it eluded them all and Novak and Federer so far have won it just once.
IF Federer won Wimbledon 13 times even with just one FO they Federer fans would be hooting and hollering like that established things once and for all and all their talk of one dimensional would go out the door despite Methuselah winning the FO JUST ONCE.
So Yea, because 13 FO for Nadal is an unmatched herculean feat it needs to be diminished and reduced to "fake news".