Will the propaganda war between the US and China ever come to an end?
It will never end unless one surrenders, which is impossible.
China sees the US as trade partner and use it as achievement benchmark, but the US projects China as enemy and threat, and eventually turn China into real enemy of the US.
China development is extremely fast in peace time. The US need tension in international relationships to slow down the development speed of China.
Without endless meddling from the US, China is able to surpass the US within two decades. Even under current tension, China completely surpassing the US is just matter of time, probably within 5 decades.
This is the main reason for all the recent major events of HK, Xinjiang, Tibet, Taiwan, Huawei, ZTE, trade war.