Wow, talk about finding things to complain about!
If you have no background in putting anything together then buy something else. The casters? Really? If you have worked with tools before that is no problem. And the power cord is easy to install with a drill bit screws. Put it where you want it.
The ventilation sheets on the second video is hitting the back "foots" of that level. Press it with one finger in from the side and it will fit good again. Or take out the tub under it and use your hand to guide it in place.
It is some scratches in it yes, I have ordered plastic sheets for one of my projects before, and they was the same way. Because that shiny plastic will scratch easily. I think FB order those plastic ventilation sheets from another company. But does the scratches make them trash?
Same with the scratches in the tubs. Will you ever see it besides when you are cleaning the tubs?
I canīt wait to read the new tread about how horrible ARS racks are when you get one of those! For each level you need to put some plastic connectors to hold it together. PS: Before you start on that, go out and buy a hammer. You will need it!