Why does my shadow only run smoothly at certain times?

I have honestly had nothing but problems lately using shadow. The only time i can even get shadow to even be usable in terms of input lag and latency is between the hours of 1 am and 6 am CST. These are obviously not ideal times which is extremely frustrating. The issue is not my internet either, I have 300+ mb/s bandwidth with relatively high upload speeds as well, and a direct ethernet connection. I cant understand why this throttling is happening, I keep seeing the same BS copy paste excuse about “the path for internet is different for everybody” getting thrown around on here, but I really need some real answers. I want to like this program and it used to function well, but i cant warrant spending money on something i cant use for much longer.