Was every dynasty a eunuch who passed on the emperor's will?

Of course not. Sometimes imperial envoys give orders, or the Royal Guards sometimes give orders. Princes and female officials can be passed on, but if most of them are eunuchs in Beijing, or eunuchs pass on, it is emphasized that not all eunuchs are called eunuchs, eunuchs have a higher rank among eunuchs, and there is still less supervision. There are more imperial envoys in other places.