Oh wait, I think you might be mixing up models a bit! The Klein 23-in-1 is actually a screwdriver, not an impact driver. I could be wrong but I'm pretty sure they don't make an impact version of that exact tool. The weight difference makes sense though, that screwdriver IS super light compared to a full impact.

Figured that out the hard way when my tape stuck better to my knee than the floor.

Oh man, I can barely remember my own password let alone plot points in public.

Not a SINGLE popped head or sagging board after 8 months"? That's WILD. I've been hanging drywall for like 10 years and I always use the standard coarse threads because that's just what you DO. But honestly your uncle might be onto something. Deck screws are way beefier and that extra bite into the studs probably holds way better than those skinny drywall screws that snap if you look at them wrong. I'm actually kind of shook right now because I've talked so much trash about people using deck screws for drywall. Maybe I owe my own uncle an apology.

Did you ever try returning the cheap one? Amazon is pretty good about taking stuff back even if you already used it. I actually had the opposite experience with a $30 crimper from a no-name brand, it worked fine for basic coax jobs around my house. Maybe you just got a defective one or maybe the Klein was already dialed in right. Sometimes the problem is the user not the tool, no offense.