"The scriptures predate the church, we might have more scriptures if they didn't burn the ones that they didn't agree with."

The OT books pre-date the church but it is the Church that codified Scripture.  The additional writings were known at the time of the first codification at Hippo and considered, by that body and later ones, to be spurious or uninspired, though some, like the Didache or Shepherd of Hermas or writings of the Fathers of the Apostolic Age are worthy of study and consideration.