Governance of Hive is identical to governance of Steem. The players are different, because Hive is run by the folks that used to run Steem while @ned held his stake and abstained from governance, and on Steem Sun Yuchen has deployed @ned's stake and rules solitarily. On both platforms whoever has enough money, whether alone, as Sun, or as an oligarchy, as on Hive, determines what happens.
@markymark has a lot of Hive, and generally participates in governing Hive. There's nothing except acquiring more stake than he and his ilk possess that can compel him to change his ways.
However, he is a human person, and can be persuaded to change what he does if the arguments he's presented convince him.
He is also fallible. He may be flagging all your posts and comments now, but sooner or later he'll quit. Even if he automates it, sooner or later the bot will break, and the flags will stop. This probably is not the solution you seek, however, because bots don't break much.
I reckon your best option is to let this account rest until he becomes fully engaged elsewhere, and to use a new account.
Something more substantial than whether he likes or dislikes someone is at work when he flags them. I dunno what it is, but whatever it is, I don't seem to have it, because he doesn't like me, and he doesn't flag me.
Might be that when I find out I am wrong about something, I change my mind and take back everything I said when I was wrong =p
I used to follow @skeptic, who was rude, raw, insulting and a bad artist. He was extraordinarily offensive to berniesanders, who treated him much as marky is you. Flagged the hapless @skeptic to negative double digits.
However, secret admirers of @skeptic voted him right back into the positives, and this happened more than once IIRC. Sadly, @skeptic vanished after moving to a different state.
What I learned from that is that you can bring an account back from deep negative territory. I've been flagged a few times too, but never that hard. I guess they give up when it becomes clear I don't care about rewards, because I provably don't spend them as money and never have.
Bullies like to pick on people that cry about it. Makes them feel powerful.
However, there's a difference between coming to a conclusion and jumping to one. I'm glad I'm able to read your posts and comments again, but you'll do well to be sure of facts and less short of tact going forward.
Also, just because a cactus has thorns doesn't mean you need to hug them to show how prickly they are.
I ain't calling you a crybaby. I just want to ensure I am blessed by a diversity of opinions, and yours stands out amongst the field as heartfelt and willing to be contrarian. I don't know you from Adam, but your determination to speak what you believe to be true no matter the consequences blends the voices of conformists into a murmured chorus that becomes a background susurration to your lead part.
Keep on speaking truth to power.
Almost none. My powerdown isn't over yet, so I hope it doesn't topple into the sea yet.