Do you honestly think Darby invented the rapture?Apostasy as rapture in 2 Thessalonians 2:3 was unseen, unsaid, and unknown in true Christian orthodoxy prior to the 19th century.
The relevant Bible translations which it is claimed contain the dogma were all written by Reformers from the 14th to 17th centuries. No Reformer ever heard of a pretrib rapture. Suffering as they were under the apostate papal antichrist, they would have found the idea risibly absurd.