Am i in the right? And was she just being toxic?

Okay so i just got done with a 5 queue which i know is my first mistake but...i ran into a player and i had to go against her because got banned and was taken from me. (Side note don't you just love my champ pool? Kappa) and since we decided to just do a normal draft queue it decided to put me up against a gold 3. So we are doing a team fight in river and some of us die, well Nids types "boosted" into chat and i won't lie i told her to "shut up" (I'm having a rough night) So yes i was being toxic myself but anyways. We get into lane and we start farming and what not and i kill her. She once again says "Boosted" at this point i can't help but slightly laugh because yes even though i was fizz she, a gold 3 got slaughtered right off the bat by an unranked. (Haven't had time to finish placements) and i want to know first off i want to know if i am allowed to feel good about killing her even though i am playing fizz.

Anyways a little later i started getting ganked by not only their rengar but also their annie. And when i die she says "boosted" and i want to know...why? am i maybe just bad and don't deserve those kills or is she just salty? Anyways we kept going for a while and i kept killing her and then i would get ganked by 2-3 other people until we surrendered because 1:i had to go call my gf and 2:they were insulting and flaming us constantly and we were just sick of it.

So there is my story and i wanted to know what you guys thought of it and who is in the right and who is in the wrong. I ended up reporting them for flaming of course and i am sure i got reported for what i said. But maybe we both were in the wrong? maybe not.