using deck screw instead of Yellow zinc construction screw？
Stainless steel is corrosion resistant ; the various paints and coatings are not  ( in spite of creative names ). In my location , any deckcrew that is not stainless, rusts to useless in about 15 years . Rust rate depends on how much time they are damp. And, even with proper clearance and pilot holes ,the coatings are degraded when driven in