It was not meant to be an insult, but I think it’s true that they’re as Catholic as you are, neither more nor less. It does not imply a put-down in itself. We’re brothers and sisters in Christ, it seems to me, no matter how difficult that relationship might be at any given time.
Regardless of how you meant it, it is an insult to say that one who rejects the very office of an infallible pope, and ensured magisterial infallibility overall, infant baptism, Purgatory, and eternal life by personal merit, Cath Eucharistic theology, the Cath priesthood and generally mandated celibacy the hyper veneration of Mary (worship), praying to created beings in Heaven, etc, is as Catholic as those who contend for all such but reject certain modern versions of Catholic teachings as being contrary to historical teaching, and thus the modern popes.
While you reject the latter as RCs, they may post in Cath caucus threads, and with the exception of rejecting modern popes (resulting in an absence that is not without precedent), they are joined with many of your brethren here who deplore Francis and certain V2 teaching.