I completely understand that it's difficult to stop ourselves from reacting quickly in situations like you've been in. Though the context of what others have said or even the actions they've taken can help to paint a picture of what has occurred. The use of your own chat is the only aspect we take note of when considering a follow up penalty. I apologize for repeating myself but after a 2-week suspension has been applied, any small point of your chat that can be noted as negative, is weighed heavily against your favor.
Players that feed, troll, or grief matches will be penalized if reported at the end of the game. That sort of behavior is taken very seriously and will not go unseen.
[16:07] xxxxxxxx (Tahm Kench): i hate
[16:13] xxxxxxxx (Tahm Kench): having inting botlanes
[16:18] xxxxxxxx (Tahm Kench): 5 games in a row
[18:50] xxxxxxxx (Tahm Kench): YOU FUCKING MEATHEAD
[19:24] xxxxxxxx (Tahm Kench): dumb %%%% (notice lower case, i.e. used in the context of the meme)
I'll take a look into your troublesome teammates you've mentioned, for a manual report. I do need to note that I cannot reveal any sort of action that I may or may not have taken due to privacy concerns.
Riot games system rewards duo queue players for griefing and toxicity in ranked games. 2 report can get players auto punished by their system. In this example chatlog the “allied” adc and duo queue support wintraded a high elo game. After communicating with these players post game it was found that no punishment was issued for the griefing bot lane. Riot games is a great company guys :).