Open item cant be found in list of items

Often when I open an item, the row with that item is not highlighted in the list of items to the left.
It also seems to be impossible to find in the list.
Since lots of information for the item can only be accessed in the row in the list, that makes the item unusable.

This seems to happen even more often with the new design.

How do i find the row for the item in the list?
Why cant the item itself contain all info, so I don’t have to go to the row at all?

It seems 99.99% of the load time for every item-page, is for the huge useless list of items and not for the item itself.
Why cant I just open the item on its own page without all the slow bloat around it?

Using this site is like being back in the 1990s using a modem.