Again, by 1877 Reconstruction was already 99%+ abandoned. The key to ending Reconstruction wasn’t the Compromise of 1877, it was the systematic white terror campaigns of the 1870’s, which hit in two waves. The first wave, roughly 1869-71, involved the Ku Klux Klan and overturned Republican rule in Georgia and several of the border states. At that point the Grant administration had an Attorney General, Amos Akerman, who actually cared about black civil rights, and mounted a counter-attack through the military and federal courts that achieved some success, and there was a respite for a couple of years.
Then Akerman resigned, the Grant administration stopped caring, and terrorists ran wilder than ever in a second wave that hit especially in Alabama in 1874 and Mississippi in 1875. By this time the Klan was passe; robes and disguises were no longer necessary because Democratic terrorists could operate openly. Any Republican, black or white, who campaigned or attempted to vote took his life into his hands, and the two states fell predictably to Democratic governments.
In 1876 terrorists targeted the last three Republican regimes, in Florida, South Carolina, and Louisiana, using the same methods and pretty much getting the same results. They claimed victory in all three states in both the state and presidential elections. As a last desperate rearguard measure, the outgoing incumbent Republican canvassing boards in all three states threw out enough Democratic votes to give Republicans the win in the presidential election and in the Louisiana and South Carolina state elections. (They gave up the Florida state election as hopeless.)
At this point the only way to keep the last two regimes (LA and SC) going would be for (a) Hayes to win the presidential election; and (b) for Hayes to recognize the Republican state wins and back the Republican claimants in LA and SC with enough military force, and federal prosecutors, so that they could maintain law and order and collect taxes. Point B, by 1877, was a long shot. The army was getting smaller every year, and the political will to use it to sustain black civil rights was no longer there.
So the parties worked out the obvious compromise–Hayes could win the presidential election, but he would abandon the tottering republican state regimes in LA and SC, and never use the military to protect black civil rights, or interfere in elections, again. (He probably wouldn’t have done so, anyway, but Democrats wanted a formal agreement.) Southern Democrats cared way more about the state elections than Tilden; once they controlled all 11 Southern state governments, they could make sure black people never voted again–at least, not in numbers sufficient to matter. (It took a few decades for Southern governments to completely suppress the black vote via white primaries, literacy tests, and poll taxes.)
TLDR version–all the Compromise of 1877 did was pull the plug on a patient (biracial Reconstruction) that was already in a coma and on life support.