You aren't successful because there is no evidence to back you idea. It's been looked at, many times. Fact is, there is no scientific evidence that any antibiotic resistance is coming from give antibiotics to cows.
Yes, I know it's counter intuitive, but when you look at the data it's clearly coming from too places:
People not finishing the regime, and hospitals.
On a dark street, a man encountered a neighbor who was searching the ground beneath a streetlight. On questioning, he stated that he had dropped my house keys and I'm looking for them. The man joined the hunt, but no key was found anywhere under the light. He stopped and asked, "Are you sure you dropped your keys here?" The neighbor replied, "No, they could be anywhere".
"So, why are you only searching here?" The neighbor looked back at the man and replied, "I'm looking here because the light's much brighter."
Infections in humans and hospitals are much more closely researched and tracked. On the other hand, the agri-business industry in the US has been rather unfriendly towards attempts to study problem of antibiotic resistance there, and research funding is a tiny fraction of what is spent on diseases in humans.
Another major problem is that --outside of a few far-sighted individuals -- only in recent times has the spread of multi-drug resistance become a topic of concern among researchers (with concern among politicians and the general public being an ephemeral awareness that comes and goes with the mass-media news cycle). Antibiotic use in animals simply wasn't being studied at the time resistance was first arising, and to a large degree we're trying to figure out what happened after the fact.
So you are correct, the preponderance of evidence shows antibiotic resistance first being found in humans, and circulated between humans. However, be aware this preponderance may be an artifact.