Valid complaint yes, but it is very very overreacted.
The only really misseable thing is the four leaf clover which is just a pve gear that can be helpful but it's not really needed for anything. Every Temtem that appears in the volcano can be captured outside of the volcano and apart from just is just some secondary items.
It sucks to have an item removed but it is just a temporary situation due to the early access (lack of) content. In the full game you will just keep playing and will get the skates back eventually.