Support locks Renekton in ranked and wants to trade waves with adc and take all gromps from jungle

Disclaimer: So I am an unhappy person and had received an insta 14 day ban almost 2 years ago (bad time in life), I crossed a line and learned my lesson. Haven't gotten one since. Im also a trash player being hard stuck gold 4 in solo/duo.

With that said, how do I approach this. My support locked in Renekton (which is fine im xayah we can work around stuns), he then says "oh no im support someone dodge". Then he demands that someone dodge (teammates tell him to since he locked in wrong champ). No one dodges and the game starts.

Ok here is where I started to tilt, like I wanted to leave sooooooo bad but didnt want to Fk over my other teammates. The renketon goes _dorans shield _ start, wants to trade every other wave, and then take every gromp. I say no and then he proceeds to sit undertower and last hit as we get poked out and doven by a ww, ez, veigar. Then renketon then starts saying stuff like "If you cant cs xayah im going to have to".

I say im going to submit ticket if he continues so he ends up getting targons after we die for 2nd time and enemy team calls him out for d-shield start.

When I want to leave so bad, or just want to flame the shit out of this guy like my mid lane TF was doing for ruining the rest of his teammates ranked game. What do I do to cope with the wasted 20 mins/lp without risking ban.

Summary: What do I do when someone locks incorrectly but then starts trolling because no one dodged? Reporting for trolling behavior only works if they go 0-25, and he only went 2-9.