I get toxic when people piss me off first. Other wise I just play as if i am playing with a bunch bots.
for examples I played several games today.
1 of my Cassiopeia games, my jungler died in my lane, last hit my blue. I didn't say anything because I understood that it was just accidents.
in my last game as ez bot lane, my supp was standing behind me all day didn't do much so I said "help me zone" and she did although she died but it was 1 for 1 I was okay with that and she ended up feeding draven from opponent's team but it wasn't really her fault, she wasn't good but draven just had too much damage, and I saw that it only took draven 3 hit to finish her off. So I didn't say anything.
However, one game as kog, my supp was bad as usual, he didn't know how to zone or ward. I had to ping him several time and I still ended up warding the bush myself. Alistar standing behind me and get zoned to the river (ridiculous). Pushed my lane when I backed and helped opponent reached level 6. So I was pissed, but my words were just: wtf, you costing me cs, you helped them reach level 6 first, and stop being a pussy. and guess what happen? Alistair didn't say anything because i was right. but lee sin in that jungle who didn't help nothing said: muted bot, shut up keep texting. after alistar who wasn't texting got caught and I tried to save him and both of us died. and called me feeder. that is what could get me toxic not when someone playing poorly, or losing a game. You don't know nothing but you bsing, insulting others while completely ignorant. He pinged for help I followed, and I was behind, so I actually wasn't willing to, I just wanted to farm, but I still went in and died, again call me a garbage. I was behind as a kogmaw. he then came bot, wanted to gank but I saw their jungler and mid lane coming too and I was too behind, so I ping him to back out like 4 times, and he didn't and screwed up and all of us died, and he blame me again for feeding useless not following up. (if I hadn't followed it, I would have survived.) I didn't say anything at that point, yet he blamed me. He is the one who made bad calls and he wanted to report me. zed one shot me and I am feeder. So I am toxic, cause after all that bs I was calling him retard and he said enjoy your ban and I was like enjoying you mama. So? player like that doesn't do crap and just blame others is better than people who curse? by the end of the game he said: i hope you change your attitude. lmao.