Thousands of empty playlists

I recently moved from a PC to a Mac and I had thousands of empty playlists in my iTunes library, which I know is a problem from iTunes Match. I thought I could fix the problem on a Mac using the Automator or a script, but now every time I try to do that, iTunes freezes, becomes non-responsive, and nothing happens. As it was, iTunes was taking about 10 minutes to open and become responsive, and then it would only work for a little while before becoming non-responsive again. Now, after running the Automator "Remove Empty Playlists" and a script, the playlists didn't go anywhere, and I can't get iTunes to open at all.

All day, I've been trying to fix this by turning off iTunes Match on all my iOS devices and getting the script to run, but nothing is working and somehow iTunes is running even worse. I don't know what else to try, but iTunes is completely unusable. Frankly, I don't even know if getting rid of all the playlists would fix the problem. I know I could check by just turning off iTunes Match on my Mac, but it would need to open first for me to do that.

Does anybody have any suggestions?