Wall Shelf Arbre 60 MBR

I saw a review that said “almost the same as MUJI”, so I bought three different sizes. The pins for the plasterboard are large and very hard, so it took a lot of effort to attach the pins to the wall, and I had to remove them somehow in order to redo one, but the holes in the wall are terrible... Also, the quality of the wood seems to be hit or miss. There were holes in it that looked like staples.

There is a plastic part with three small holes 7~8mm in diameter attached, which is used to fix the metal fittings to the plasterboard. The holes are not drilled properly, so the nails won't go through. I have a special tool (pin vice) for drilling holes, so I was able to drill the holes, but I wonder how ordinary consumers would do it. I think they would be troubled.