Ironically, the comment you replied to stayed on top of the thread for about 30 minutes, gaining upvote after upvote, and then instantly got kicked down to the bottom, while still showing the original score.
This is very different from the usual time+score-based ordering and looks 100% like a manual override. Strange response to trying to be objective.
For what it's worth, every other comment I looked at which appeared above yours was made after yours (excepting two made an hour prior with dozens of replies and presumably plenty of votes). Other comments can get upvotes too.
Sort of like... claiming there is a conspiracy about downvoting comments? Seems like a non-factual claim with no evidence (also could be called a rumor).
The simple answer would be that some people agreed with you and then later some other people disagreed. Combine that with people posting other comments after you, and other comments having significantly more engagement than yours.