
PeachSeason:
Somebody suggested me to create a second account just to have it as a database, but I'd have to transfer them one by one and I don't have time for that at the moment. Maybe you can try that option.
That wasn't quite what I had in mind. I was thinking more like start a new account to use more actively, and then, I don't know, whatever makes sense for the older one. Though maybe I misunderstood and you want to keep using this account as your main for social reasons.

hafsaroni:
Hey, came across this! What did you end up doing? I'm trying to find a way to private my kdrama watched list and going to watch list
A year and a half on my PTW is a black hole of good intentions I've mostly given up on using and titles just pile up on the Completed. I keep a spreadsheet with the info I'm interested in. I've found ways to use custom lists instead which are more manageable, though my main diary one does get unwieldy as the year progresses but it's a good place to collect some thoughts on each and I like having them to look back on.
You can make custom lists private, so that might be an option for a private PTW.
Or a secret account you aren't social on and don't tell anyone about? There aren't any great options, just work arounds.