First off, yes, rank-shaming is a thing. If you're using someone's rank to attack them, you're rank-shaming them.
Second, no, that does not mean that you could report everyone and they'd all get punished - the IFS will only punish players who break the rules. Of course, if, somehow, everyone in literally every one of your matches is being toxic and attacking each other with their ranks, and so on, they might all get punished, but, still. You're drawing the wrong conclusions.
Third, if I recall correctly, in your previous thread (which you deleted for whatever reason), your chat log showed at least three instances of hate speech, resulting in your escalated punishment. The rank shaming and general negativity also played a part in your punishment, but the hate speech certainly merited the escalation.
EDIT: Found the reason you deleted your previous thread (if there was another) - you had another thread already with the topic of your punishment and provided chat logs there as per request, and, it seems I recalled correctly, there were three instances of hate speech.