Yes and no. American companies get lots of top-ups just in other ways that are less obvious. Lots of protectionist stuff going on in the USA long before Trump came to power. Any time US companies look like they're running into trouble you can count on tariffs, or low interest loans, or mysterious new grant money to pop out of nowhere and benefit them. Lots of no-bid military contracts with lots of room for extra billing with little to no oversight. The US and China are not alone in this either. Every nation does it ... they just all act like they're innocent little doves fighting the bad guys.
That's a very fair assessment. Cronyism has definitely dominated for some time and distorted the ability of the market to do its job, and it's not unique to China, although in China's case, they've been a lot more overt about it and have explicitly bent the WTO to their will over the years to enable them to get away with things other countries can't within the rules. The current US administration is a bit more overt about it than ones in times past, even going so far as to take unusual steps like buying a direct stake in select companies as I mentioned earlier, no doubt in an effort to preserve the ability of otherwise failing companies to endure in order to ensure a strategic player doesn't die off.