I don’t have anything even remotely positive to say about the nature of presuppositional apologetics. When you base your entire argument on the “presupposition” that Christianity is true, and from that, you conclude that Christianity is true, that isn’t forming a rational argument—it’s begging the question like a complete asshat.
I’ll let my bro* NonStampCollector handle this one. Highlight that absurdity, bro!
Top tip: This argument works equally well to argue for the existence of the Flying Spaghetti Monster. When that’s true, you may wish to rethink your beliefs.