Why are people so provoking

I just had a game where this leblanc kept trash talking me cause she dodged two of my lux q's and then i killed her, twice in a row after, and then replied to her, "did u predict that coming" and she claims , "lag issues". BY THIS point my bot lane already fed the vayne 5 kills and this ashe was feeding hard-core. The leblanc then brings then her jg and ganks me and i manage to kill her, which seemed to trigger her and the next 4 deaths of mine were from their jg, leblanc, vayne, and support all camping mid. My team doesnt respond and i call it gg as fed vayne, fed mid laner now, and top was feeding 1/3 also. The enemy team starts trash talking me about sucking, and I admit I said it wasnt myfault i still beat u at mid leblanc, just my bot lane fed. AND THEN MY TEAM LETS IT RIP, YELLING AT ME and calling me trash and that the ashe was a new player, and it was my fault we lost. What can i do if im being 5 vs 1 and hiding under turret is useless. Then beings the dramatic talking in which im blamed for the loss and all i say is, "1/13" ashe and then they all agree to 9x report me....We win the game in the end due to the jg and support and my stuns/dmg that carried to victory, but everyone yells at me for fkign up.....In all fairness if I had a good team, it would have never came to the point where the whole enemy team was camping mid and no one on my team responded. I did apologize to the ashe for calling her bad as she was a new player, but the way everyone trash talked me, especially this leblanc, nunu, and annie who thought they were superior, because they could kill a lux 5 vs 1 style. I was also blamed for dying to the vayne who at this point was 16/4, as she one shootted me via her ult. what can i DO xD, a q can root her but her arrow still works, and I died, not fast enough to beat a basic attack XD. This leading to once again me saying I didn't feed her dont look at me, ask ashe, and then everyone rages at me again, which is totally unfair. I was provoked so hard this game which I am 96% never am. I just want same clarification as to what I should have acted like and whether I was at fault or not. I do admit to the fact that I may have been a little toxic/salty though the use of, "well if u can 1 vs 1 me leblanc, instead of always grouping me...Earth to my team...hello..." I was just stating facts I wasn't swearing or trash talking the other player. Please tell me what I should have done in this situation and the various viewopoints on what others would have done.