The headline sounded odd considering EU countries aren't exactly averse to subsidies, but the kicker is this:

The inquiry, announced last month, was the first of its kind and marked the maiden use of a foreign subsidies regulation designed to stop state handouts from distorting the EU’s single market.

So it's protectionism that'll apply especially to poorer and up-and-coming countries that don't have established private megacorps (i.e. their companies depend on economic strategies like window guidance to grow).

I'm neutral about protectionism in general, but contextually it can have negative outcomes - e.g. the EU's agricultural policies have not been good for poorer countries. At a time when poorer countries are bleeding money as we can see by tracking Net Resource Transfers (with China being one of the few exceptions), it's a little tougher to be happy about policies like these.