So, in your opinion - in order for Zelensky to not be a dictator, he has to break all the existing rules of law in order to completely replace the existing constitution?

Not unilaterally, no. The constitution establishes a dictatorship, therefore it would need to be replaced or amended to no longer have a dictator. Alternatively, they could rescind martial law, thereby ending suspension of elections and no longer be a dictatorship. And that would be required to allow them to amend the current constitution following its rules. Not saying any of those are good ideas. Just listing the options they have to not be a dictatorship (technically he could just step down as well, but that wouldn't change their government structure; just change who the dictator is).

Not his fault he's a dictator. But dictator literally refers to someone who rules in time of emergency. So by definition he's a dictator. I don't mean it as a personal insult of the person who happens to be in the position nor am I saying its outrageous for someone to keep such a position.

He’s not a fucking monarch dude, he’s the elected head of state - he doesn’t have supreme authority to do whatever the fuck he feels like.

Which is irrelevant to the question of whether he's a dictator or not. Don't forget that the first dictator most people probably think of was also an elected head of state. Obviously I'm not comparing the actions that the two did using that position. Simply being a dictator doesn't say anything about whether their rule is justified or whether they're committing atrocities. I do think leaving the loophole in the constitution is a liability, so it eventually should be changed. But its not exactly a high priority right now.

And that’s all putting aside the question of how you would even hold an election in war ravaged Ukraine right now, a significant portion of which is under hostile occupation lol

Irrelevant, since my critique actually has nothing to do with Ukraine, but about constitutions in general.