I do understand where you are coming from with your remarks, as I do the exact same thing in that situation. but online, its hard to actually know the tone. and reading it by whoever works at that department, sounds like you are raging and giving up w/o trying to look at the best of the current situation.

I wont say you were being toxic since I know where you are coming from (simply stating the facts, cuz i dont care how many people tells their anecdotal evidence about how they won 4v5 "alot of times" odds are, its probably less than 5% of the time, and in your situation, with a straight up feeder/troller w/o an actual afk, its probably less than 1% of the time) but by just the words, it sounds toxic.

next time, just stop after stating the facts "guys, game gave me top, but this guy is trolling me" etc etc

basically make it SEEM like you're being positive. you HAVE to be passive aggressive here, feigning innocence when you have an anterior motive. its really stupid the way the punishment system is set up, it makes you work so hard to not get yourself punished along with the actual troll.