A lot of Discords use bots that focus on keywords, which highlight stuff like profanity faster than non-constructive or FUD type posts.
Keeping in mind that a small mod team can't see every post in real time - and reporting posts/comments can help - it could be an automod caught you because of profanity and the other person just had non-constructive but non-automod rule breaking comments.
RE: the "questiong of moderators", I haven't been to the Discord yet, but if there's a rule about it (No Discussion of Moderation publicly, etc.), I mean, it's pretty obvious that rule was broken.
If I may recommend (unsolicited, of course) something? If, in the future, you get an infraction, rather than post it in General or publicly, reach out directly to a moderator. They should be able to tell you what rule you violated and how you can move forward without further infractions.
Anywho, have a good one and good luck!