I reverted to 12.3.0.44 and haven't had any real issues since removing 12.3.1. I did upgrade to El Capitan. I don't know about getting 12.2.2, but I should think you could download 12.3.0.44 from one of the non-Apple sites mentioned in these threads and do okay. I think I'd make a copy of your current iTunes, though, and keep it somewhere safe in case, for some reason, you have trouble w/ 12.3.0.44. But the latter seems to have worked for quite a few of us who had trouble w/ 12.3.1.23. I'll paste here what I've listed elsewhere:
This is from other people. Worked for me, anyway.
Download 12.3:
http://www.v3.co.uk/v3-uk/download-review/1957301/apple-itunes-for-mac-1110
Then:
- Open the Terminal
- Run "sudo rm -r /Applications/iTunes.app"
- Re-install iTunes
Also, be aware that when it asks for your password, the password won't be visible as you type it. After you type password, hit enter and iTunes should be deleted.
After I reinstalled 12.3.0.44, things worked as before. Note: I had to restart to my iMac before the version number in Finder matched the actual version number found by looking at "About iTunes" in the menu. Also, I then ran repair disk permissions via OnyX. It showed some problems w/ iTunes permissions, but those may or may not have been relevant to any of this problem.
Good luck and hope this helps.