Dominator gets a lot of benefits from being at the front of the park, namely more operating hours and a higher influx of traffic because it's the first major ride guests encounter. As rwash said, you can't really judge these numbers fairly without operating days and operating hours but even still a 25% drop in ridership from pre-COVID numbers shows a massive shift in some combination of the operating hours of the park and the priorities of its guests.
Twisted Timbers arguably benefits from its limited capacity which is why its ridership hasn't changed all that much. It definitely has the higher demand compared to Dominator and i305 but its limited capacity ensures it's achieving close to its maximum when it counts.
Simply cutting R75's ridership in half would put either side in the neighborhood of Apple Zapple and Woodstock Express. However since KD sometimes operates just a single side of R75 the preferred side might end up with ridership closer to Reptilian and Anaconda. Instead of being #3 or #4 in the park it'd be closer to the #8-10 range, really.