Generally, and for the future: is this the place where account's owner could Oppose the arguments - Or has the owner anything to say here?
Alright, after few moment of noticing it I have considered removing my support for flags. I hope you are well now, and try to stay safe in better way than before.
Now you can oppose the flag even though the support is still there. Maybe some of them haven't noticed yet, so consider contacting them via PM or bumping this thread to let them know.
Right now it's already inactive since it does not have sufficient support, so it's should not bother you as it won't show up under your profile in forum posts and replies.

I haven't added a flag to anyone yet, but can it be removed after adding it like our tag on other users' profiles?
If it can be removed, you might consider removing it.