Plenty of esper decks run settle

And dropping rhonas in this scenario changes nothing. You double the power of your board, then swing into settle, or pass the turn.

Merfolk go large can create a board stall

And mono green outvalues basically all of merfolk's creatures. If there's a board stall it's because you haven't been aggressive enough, or you're going to lose because merfolk has hit critical mass and has been tapping your board and chipping away at you. More importantly, what is doubling the power of your already stronger creatures going to do if you're unable to push attackers through in the first place?

Rhonas doesn't shine on boards with huge beaters. He shines on boards of smaller, cheaper creatures that suddenly present lethal.

Board stalls rarely happen outside of battle cruiser magic, because players run interaction and are willing to pressure opponents and make trades.

I guess it's not mono red so you think it doesnt exist or something?

I don't even know what you're trying to insinuate here.

Board stalls in which both sides have massive beaters tend to happen in kitchen table or battle cruiser magic because plays don't bother running interaction and value their beater attacking safely over pressuring to close a game.