Yeah, training when there are so many on-boarding at the same time is rough. The way we do things now make training different than in the past in the sense that instead of dedicated teams that worked the same task all over the store, we have "dedicated business owners" who do everything in one area of the store. So there are more things one person needs to do with the same products. I still haven't really figured out how to take care of price changes in my area or certain aspects of backroom management and I consider myself to be a veteran.
And yes, some of us don't have a lot of patience with the seasonal newbies. Some of them have been assigned to me for training, and I think I'm pretty patient with a new person, teaching them enough to be able to do the immediate task but not overwhelm them with lots of details all at once. All those things you listed in point #1? For someone who hasn't had your experience in retail, that would be completely overwhelming.
As to points #2-4, it's kind of a conundrum in that this is the overload busy time of year and when we bring on lots of new staff. Everyone is up to their eyeballs in work load and needs help, but no one has time to properly train the newbies.
Then there was the TM who hired in seasonally and her very first shift was as a cashier on Black Friday. Wow, really? Welcome to the land of Target.