Flaming and why it's every person on the Teams fault

I recently, as in 2 min ago lost a game and ended up flaming pretty hard by the end. Am i proud of it? No, but i stand by it. After repeatedly getting ganked by 4-5 people in the bot lane getting no assistance from my team even while asking, when they do show up they ignore the enemy jinx and try to focus fire the ulting cow. After 15 more minutes of watching this type of thing one of our teammates says "fuck alistar". By this point I'm just livid at how people can understand so little about the game and respond with, "fuck your game sense". At this point everyone but the support starts flaming me telling me how bad i am and how my kda sucks 4/6/3 (I started off 3/0 before i inevitably died due to the pressure i created). By the end I'm flaming back and hard. I fully expect a ban i think is coming for my last statement. It was over the line but when im on a team of people who just like the rest of the league community refuses to accept that maybe kda doesn't reflect skill idgaf and am not thinking clearly. Our taliyah for instance either started fights and ran away because 3/4 of the time they missed every single q, and never pinged mia, always showed up late to roams EVEN THOUGH SHE'S TALIYAH. But hey she never participates so she's 10/5 cause cleanup crew, and she is the "GREAT" one on our team.

TLDR this is me venting but maybe think about what you could of/can do to help your team mates before just telling them "To get good". If you don't have advice on how they could do better, can it and try to help them.

Edit: I think this comment provides a slightly more coherent version of what i'm trying to say since i've had some time to calm down

I'm not saying that im excused, I'm saying that people breed it and incite it from people. I strictly mentioned that i was not proud of what i said, but i stand by saying it due to the circumstances that led up to it. Maybe i should have phrased it better but i was visibly shaking with rage at the end of that game. People typically see a flamer and then it becomes a group war to humiliate and tread on that guy who stated hey man your doing something kinda dumb and blaming it on the enemy picks. I did not state it very well but the community as a whole is prone to this type of behavior. I am not a person with a history of flame or aggressive chat behavior. And until i got to a point where i was watching my team play with zero map or situational awareness i was pretty polite about it all. But the second i criticized our 1/6 lee the entire team throws kerosene onto my already salty self their not helping their actively producing the flame by prodding at you until they hit a button. I've seen this since i started playing. I've been in that position before but when i ask for a gank and ask specifically to not target the ulting cow i get 3 "you just suck"s. That will always result in a player beginning to tilt. When they're already tilted and have been asking for assistance and all you tell them is "You suck" while making no proactive moves to help and just letting them get camped and dived on repeatedly then show up late to get a kill and give an extra 2 kills to the enemy even though both of them were in position to be there at the right time. You can call me a child or whatnot but i think players should use their head a little more rather than just assuming the only way to respond is to throw kerosene on the fire and use them as a scapegoat for the entire L.