And how did those few bacteria get their antibiotic resistance? Were they specially created that way or did they descend from non-resistant bacteria? If they were specially created that way, why would God create a bacteria that would defeat man's attempts to survive it? Does God hate people that much?
Same way humans do. It is a well known fact in medicine that continued use of a drug for a long time will lead to loss of its effectiveness in the individual. That is why people with long lived problems have to change their medications frequently and cannot stay on just one for their lifetimes even though they may at first be effective.