Isildur gets a bum wrap. Yes, he did fail, but he was battling Sauron’s will and malice in Mount Doom. Do we mock Fingolfin for losing after wounding Morgoth seven times before the peaks of Thangorodim? The Isildur hate is like mocking someone for getting poisoned and dying.
“Ha, ha! After you were poisoned, you died! Loser.”
That’s just not fair.
It’s like making fun of sprinters because cars are faster. The Man contested with the will of Sauron! He didn’t win, but he did try. Come on.