@I_Choose_Exile@famichiki.jp Sub-toots can be seen (at least by me, I don't know about others) as passive-aggressive. If what you're saying can be said to the other person's face, then mention them; if it can't, then just don't say it.
Also, a sub-toot, by its very nature, doesn't add context, which is not ideal for having informed conversations.
In this case, we both know the context, but maybe other people won't and then they will only have your side of the story, which is not good either.