I used to play in bronze 5 (and sometimes 4) from 2014-2015. And people literally inting like you described would happen really often.
(14 games in row was my high score)
But if the player doesnt say it in chat, they would need to manualy (actual person doint it) watch the whole game replay just to chek it, and most of "inting" report are just people in not bronze 5 or 4 having a really bad game having a kda of 3-15-5 or something like that.
I dont think there is a solution but if you arent already hard stuck in bronze 5 since a long time you wont see it often
(staying there more that 2 or 3 months while playing a lot will make you be in the same elo as thoses that literally int all the time)
its ben years since ive ben in this elo (im a silver 1 player now) i dont know if its still as horrible, and i dont want to go chek.
But you shouldnt worry about theses players since they will be seen quite rarelly and will probably just make you lose 1 game per many months