A grown man complaining about another grown man blocking him on social media? Is that how far down Ethan has fallen? And complaining about a youtuber acting? Doing a voice and a schtick for a camera? Why even waste the breath, Ethan?
Specifically he's complaining about Markiplier muting him on Twitter 4 years ago, after he made a grim tweet about trying to get Hila pregnant
He discovered he'd been muted a year later after Markiplier mentioned it on a podcast, and then seethed about it, complaining about Markiplier having a SFW OnlyFans and that he'd ghosted Ethan's invite to come back on the podcast, and arguing that Mark should unmute him.
He continued to quietly seethe about it - to my knowledge Markiplier never addressed it again
The most recent blowup has happened because Ethan - who clearly has been nurturing his petty grievance for years - mentioned on one of his streams that Markiplier is a "psycho" for changing his voice and that he's annoying and fake, and suggested starting a "Snarkiplier" subreddit (and getting mad at chat for not agreeing with him)
This clip became popular on /r/YouTubeDrama which lead to H3H3 fans brigading the subreddit even more (they were already brigading over Hasan), which Ethan encouraged by specifically calling out the mods of the subreddit on another stream. The /r/YouTubeDrama mods have now banned anyone who regularly posts in /r/H3H3Productions (and /r/H3Snark, because they're sick of the constant Ethan arguments).
Thus his recent stream. As I said it being a "content nuke" is really about his upcoming 90 minute Hasan video and the Markiplier stuff is a "joke". But obviously he's still malding about getting muted on Twitter four years ago and ghosted by a big content creator, so while he's styling it out as a joke, he's a petty spiteful little man.