I can't speak for people who post these things about him now, that may well have to do with envy, but those who criticized him in the past, at the time of the Revolution, weren't merely angered by the fact that Nicholas II was wealthy. They were angered by the fact that he allowed many of his citizens to live in abject squalor while he and his relatives lived in splendor.
A sports star, musician, actor or actress has no real responsibility to society. A decent humanbeing should care about others, but we are not required to. Nicholas, however, was the ruler or Russia, and did have a responsibility to his people. Whether or not he could have successfully pulled the masses of Russia out of poverty is an entirely different question. Perhaps he could not have, but did he really try?
Anyone who knows even the least bit about the living conditions of 19th century/early 20th century Russian peasants, though, should hardly be surprised to discover that some felt resentful of the Romanov wealth. Peasants may have had kitchen gardens, but many (if not most) still lived in terrible conditions. I have read many "credible" books on the subject and I really don't buy into the idea that everyone was just dandy before the Revolution. By the same token just as many were no better off AFTER the Revolution, either. Some found themselves in far worse conditions, actually. Try reading about Collectivization and the nightmares that resulted for many peasants (the ones branded Kulaks in particular) from that Soviet experiment.
Personally, I view Nicholas as a kind man who was sadly oblivious to the misery that many Russians endured. A more innovative or ambitious ruler might have thought of ways to help begin to pull the peasants out of their staggering poverty (through education for example) but Nicholas wasn't trained to be such a man. He had a reactionary father who barely educated him in the ways of dictatorship let alone any other style of government. I view Alexander III as being in many ways more responsible for the failures of Nicholas' reign than Nicholas was himself because he trained him so poorly. I don't think Nicholas' intent was malicious or that he was greedy. The Tsar actually lived a very spartan life in many ways given how much wealth he possessed.
As for his being "doomed", it depends on how you look it. The Revolution might never have happened if it weren’t for the disastrous effects of WWI. I believe Lenin himself admitted that he thought he would never live to see a Revolution in Russia and was taken by surprise when the first Revolution occurred in early 1917.
As Belochka has pointed out, the Bolshevik leaders were no better than the Tsar. In my opinion (which is admittedly biased) they were far worse. They knowingly caused suffering. They created a famine that killed millions. More than one famine actually. My great-grandparents actually met while my great grandfather was working with a relief organization sent to Russia in 1921 by the US Government to help feed the famine victims. They tried to help as many as possible, but the 10,000 a day they were feeding throughout Russia at one point barely made a dent in the famine. The conditions he encountered there, and that my great-grandmother endured, were really unimaginably horrific.