This really sucks for some people, but the true impact may be overreported and is definitely blown out of proportion by the review bombing. While all this is hugely controversial on reddit, if you look at steam charts, the player count did not take any obvious hit. In fact it follows the natural trend after every content release. So at least on steam the delisting seems to have affected almost no active players. It's…
Checked out of curiosity, at the time I started writing this comment, the Steam store page lists a total of 465,340 reviews for Helldivers 2, of which 137,264 are negative reviews left in the last three days. The game was released ~3 months ago, giving us the beautiful statistic that over 3 months, 1/3rd of all reviews were negative reviews left in the last 3 days.