I managed to get into Stardew after some insistence, but I also struggled with this for a long time and I know exactly why in my case after coming back to harvest moon for a bit: the player character is too slow. You spend soooo much time walking and unlike HM/RF you don’t have a sprint button, so everything becomes more stressful to do.
MH betas are usually pretty much demos, there’s little change compared to the release.