I hate to say it but I really think this is the end of the Sidemen.
It seems obvious that some of the Sidemen are very mad about the JJ situation, and it seems like there has been some conflict between them recently. The fact that he said. “But you knew it was coming for a while” shows there has been discussions around him wanting to leave for a while or something similar. On a side cast a couple months ago KSI mentioned about how he thinks the videos should be shorter. Which to me can mean that he felt like the videos were becoming too tiring or awkward to keep on schedule. I might just be waffling but to me I don’t see this going on much longer. And it’s sad but maybe it’s what’s best now.