They’re winning out over mankind’s efforts to eradicate them.
We have always tried to eradicate them. They have always tried to 'infect' us, or 'consume' us.
It's a back and forth struggle.
We kill cows by the billions, but they are still around. So I doubt that they will be able to 'infect' everyone, and I have no doubt that we will come up with some kind of 'treatment' that will work.
I don't think that bacteria intend to eradicate humans. I think it's their job to force our lifeform to adapt and evolve.