After removing the couch, I put the desk together. Mostly. The instructions said no tools were needed. They lied. I needed a rubber mallet. I found out I needed a rubber mallet after almost destroying the wood by tapping on the pegs with the pipe wrench. When I noticed the problem, I used the heel of my hand, my fist and a great deal of swearing. The rubber mallet worked much better.
Here is what replaced the couch: