What's to complain about? They're no secret, nor is their purpose. A government subsides a developing technology to offset the initial investment required for companies to undertake development, drive market adoption once they have a product, and establish a high market share and, ideally, market dominance for your preferred - e.g. domestic - manufacturers. Once that happens, a government will generally try to recoup those subsidies through taxation of sales revenue, and - in some cases - on domestic users of the product (e.g. the UK's plans for a per-mile tax on EVs). The size of the subsidy generally reflects their confidence in the size/importance of the potential market, and therefore their ability to recoup their investment. EVs are not the first market this game has been played with, and it surely won't be the last.
A government pulling those subsidies, while their competitors maintain theirs, is simply them saying they don't feel this market is going to yield a return on their investment because reasons, or that they feel the money is better invested in other markets with a larger potential for return. The governments that maintain their subsidies are simply placing a contrary bet. No, it's not a "free market" move. There never has been a "free market", so stop kidding yourself about it - capitalism and free markets have always been about protectionalism of corparate and national interests first and foremost, and always will be.
The real question here is which technology you feel will be the long term winner, ICE, EV, or maybe even something else entirely? Given that, which goverments are playing their hand correctly should be QED.