One of the main problems of The Force Awakens is that it undermines Return of the Jedi by undoing the happy ending of the latter and the accomplishments of Luke, Leia, and Han, by bringing back the Empire and confirming that they were never defeated at all. The Empire Strikes Back did the exact same thing to the original movie, by bringing back the Empire and confirming that they were never defeated at all.
In a “real” world the emperor would have been unable to get enough money to continue the war while he still had not payed for the first death star. Taxing the empire too much would cause recession, “printing” money to spend would cause inflation.
No seriously I think the problem people have with TFA is that the empire is back under a new name and the republic is reduced to the resistance, ie the same status as at the beginning of ANH/SW1. Which flags for a lack of creativity, as well as not being a logical continuation after RotJ. There’s got to be lots of other possibilities for a basic premise for the sequels, infighting within the republic, the empire (and thus the new republic) has shattered after the emperor’s death, war with an alien race, the young skywalkers uncover a conspiracy against Luke’s jedi academy, etc. Fill in what you want and can motivate. But they used the exact same premise again, with no good motivation.