If Darby said anything in the bible is wrong, then he’d be wrong.
But you misrepresent Darby. Christians had various favorite theories; fewer of those who held the theories elevated them to the level of basic faith upon Christ. Now not all the theories could be true, but some were nearer the truth than others. God in His grace will graciously correct the errors of a willing soul. I too have some theories, but I do not depend on nailing them all correctly for salvation.
I don’t see how I’ve misrepresented Darby, considering that all I’ve said was 1) he came up with the premillennial dispensationalist eschatology, and 2) his theory is a historical anomaly that didn’t exist for 1800+ years after Christ. Both of these facts are readily confirmed by a look at church history or an encyclopedia.
Please note my previous post where I quoted Justin Martyr that “other believers hold otherwise” from me and remain believers.