I agree, it's like we've picked a fight with Mother Nature.
Reminds me of a day I was out with one of my landowners, he was showing me his property lines. We were coasting down this lane, and he wheels out into the pasture and stops beside a thistle. He pulled a hoe off of the back, took a good swing and chopped it off at the root.
As well as I remember he said something like this: I've been fighting these things all of my life and I'm sure they'll be here when I'm gone.
It was a "red top thistle", in a way they have a pretty bloom, cows will walk around them, they are worthless. But the bloom will get the size of a jar lid, and when it matures it's very similar to a dandelion. The seed head will pop open with hundreds of little fuzz-ball seeds that will float and drift in a breeze so slight that you can't even feel it.
I was back on the farm yesterday, cutting and spraying again. I'll tell you if this Roundup kills the autumn olive root system like I've been told, I'd say that I have the upper hand now. I mean on the farm and the Ratliff place too. I'm glad that they didn't have another 5 or 10 year headstart on me. But I'll keep pecking away. And I'm sure they will be here when I'm gone.