On Sat, 1 Aug 2020 21:01:07 -0700 (PDT), AK
wrote:

I am looking for an easier way of removing this piece of particle board.

https://imgur.com/a/QzNlWUg

Lay a wet towel in the middle a few inched from the edge and in a few
days you can pull it out with your hands. Cut some 1x lumber for a
ledge, sitting on the floor and replace it with plywood.