1891: Mr. East's Experiences in Mr. Bellamy's World: Records of the Years 2001 and 2002 by Conrad Wilbrandt, translated from the German (Des Herrn Friedrich Ost Erlaubnisse in der Welt Bellamy's) by Mary J. Safford; available at the Internet Archive and Google Books.
This story of a man who wakes up from a long sleep to find himself in a socialist dystopia is apparently the earliest of a number of rebuttals to Looking Backward, 2000-1887, Edward Bellamy's 1888 tale of a future socialist utopia. It is not an "end of the world story" (as required by the OP) but it shows that "the notion of falling into a coma and arising to a world that is fundamentally worse than it was before" was already firmly established in 1898 when H. G. Wells wrote When the Sleeper Wakes.
The following is from Everett F. Bleiler's review in Science Fiction: The Early Years:
Mr. East, a Berliner, is impressed with Looking Backward. At a small party he and his friends, drinking a little too much, have a heated argument about the possibility of suspended animation like West's. The argument ends in a dare for East to try it. Present at the party is an intelligent young Hindu who has been a pupil of Yogi Haridas and knows Haridas's technique for suspending life. He performs the necessary physiological processes on East—cutting his tongue ligature, folding the tongue back, sealing body orifices—and East is stored away, to be revived in a short time.
Something goes wrong, however, exactly what, East never knows, for he does not awaken until 2001, when his body is found. He regains consciousness in a hospital, where he is tended by Sister Martha, a sympathetic, intelligent young nurse who acts as an introduction to the world of the future.
East is very enthusiastic at being in Bellamy's world and cannot understand why Sister Martha and others do not share his enthusiasm. He is gradually enlightened.
His first disillusionment comes when he reads through a file of newspapers to see what life is really like. There are, of course, no personal advertisements, since there is no personal commerce, but the newspapers are filled with announcements of government products that are now available at certain warehouses and of projects that will be undertaken in certain areas. There are also regional protests that such projects have never been finished. East reads of thefts of credit cards, crimes of violence, domestic disputes arising out of governmental policies, charges of sexual favoritism, complaints about scarcities and shoddy goods, protests about job assignments, objections to educational classifications, and similar matters. He learns that the original idea of assigning work on the basis of individual preference had to be abandoned, for one-third of the population of Germany applied for positions as hunters and game keepers, and no one volunteered for the hard physical work. All this is upsetting for East, but he still has not lost faith.
[. . . .]
The upshot is that East is assigned a job as a minor inspector of agriculture, since he has had farming experience. His special assignment is to discover why egg production has fallen off. He is given a very small salary and told to make do with it.
After a while East sees what has been staring him in the face from the beginning: The fault lies in the system, which is wasteful, inefficient, and shortsighted. This is proved when war breaks out unexpectedly in Central Asia, which had been Germany's best customer. Raw materials will no longer be available, and there will be no market for German goods. As the book ends, the government has been forced to declare very severe food rationing, and it is obvious that the culture will topple, with what results cannot be foreseen. The manuscript ends abruptly.
Also included is a series of journal entries by Sister Martha, East's nurse. She had planned marriage, but state allocations and assignments made her postpone marriage for years.
Well-reasoned, but the fictional vehicle is not strong. It is probably the best critique of Bellamism from an economic point of view.