The studio addressed the matter in a Reddit AMA a few weeks ago, explaining its decision to buy csgo skin add microtransactions to the game after stating years ago that it wouldn't, but the anger hasn't gone away. Probably because those microtransactions are still in there, and haven't been changed in any big way.
Now, Overkill has issued a frank apology on Steam.
"The past few weeks have been some of the most challenging in the history of this community," the statement reads. "Players have been angry with us, media have written about us en masse and our volunteer moderators went on strike. For all the distress we've caused the past few weeks, I'd just like to take the time and say that we’re sorry. We've done a lot of things right in the past, but these past few weeks we screwed up.
"We need to get better at many things, and we will do our best to improve as soon as possible."
Their efforts to improve include this 2-hour discussion with three volunteer mods that went on strike: