Since I was present at the time of this, from what I recall he did warn you (could be wrong & can't say how many times as I was pretty tired, so I apologize for that) on the way you were behaving. I feel like both sides are to some extend in the right here though. I understand your point of view in that some people got away with things they shouldn't have, but do understand that every admin is different, we're just humans and we interpretet things differently. He might have seen it from a different perspective from yours and thus decided to take the actions he did, Ciffon would need to reply here himself to confirm that though.
In case you see more of the racism you mentioned and no action taken on them, please do report it (whether that be via forum, discord or by PMing an admin or any other way you can think of) so that it gets brought to our attention as messages may be missed by current online admins. And since you mentioned administrators doing it aswell, please report that to our leadership so that they can take action against said administrators.
And seeing as to how my mute on those 2 guys were included in this, they weren't exactly offending anyone, they were just being annoying spamming/flooding global chat being provocative.
Hope this helps.