Yeah, working with cattle could be frustrating, horses too, just cause you wanted something ,doesn't mean they did. One of the hard things dealing with kids on horses, was getting across, the horse would pick up how the kid was feeling and act the same and or worse. Dealing with the parents was often harder, an expensive horse did not mean a good horse, an older horse was often better, and CALMER. A"good" horse for kids and beginner riders was a horse that could be used for most anything. Hell, I seen horses that were scarred of cattle, could not be loaded, were only good for barrels or poles, or only the show ring.
Cattle, well once they were stirred up, every thing could go down the tubes. The old man was trying to load 1/2 a dozen dry cows one time, get a couple in the truck, they would turn and push the others back down the cute. After 4, 5 times, told him to just leave them a bit and I would load them. Was told they would dam well load as didn't have time for it. Told him, he would be doing by himself and left. He did not get them in the truck, but did get walked over by them all in the chute.
I learned some from old timer that worked for us, he most never got in a hurry, near always got the last piece of pie, winked at me while eating it, knew more about horses and cattle then most 3 or 4 people put together. Didn't worry if he forgot his teeth, said would just gum it till could be shallowed. Rode the tallest horse around, needed a stump or rock to get on or off, he was about 75 them days.
Sometimes cattle, horses, people all need a bit of time to see the way, weather, light, noise, excitement can make things go sideways, and knowing when to stop, slow down, change, is the hard/difficult part.