Haha touché but i still firmly stand behind what i said. I think Murray had the game to compete with the other 3 and i don't think his FH nor his mental focus was a big problem at all. His second serve WAS a problem because too many players attacked it and put him on the back foot immediately but again, his all-round game was fine in my view. I've been watching Murray his entire career and despite obviously being one of the fittest players on the tour, he would consistently tire out faster than the other 3 and i refuse to accept its his game-style. Federer you could maybe dismiss because he plays aggressive quick fire tennis but Nadal and Djokovic have a way more grindy physical game yet barely tire and seemingly have unlimited stamina.
Also i'm not saying Murray's comparatively low slam count is completely dependant on possible cheating by the others. His serve became garbage in the latter 1/3 of his career and he seemingly never fixed it, possibly due to his back issues and he would often refuse to pull the trigger during rallies when he should of but he showed time and time again that he can compete with them yet couldn't outlast them in the same way almost every other player on the tour can't, even now. I find that suspicious even if noone else does.