Inflation is what causes the dollar to drop in the first place.
Inflation causes price and wage increases.
Price and wage increases make cheaper foreign goods more attractive.
Price and wage increases wipe out any benefits to exports from a lower dollar by increasing production costs.
Didn't mean to go over your head.
You are quite incoherent about how such a situation miraculously causes imports to undercut local items. The same weakening dollar chases after both.