That fixes the ads but still the official reddit app is a huge backstep from the now cutoff apps that made browsing reddit a pleasure. It's just a rippoff off all the terible algorihtm based Facebook, Twitter and Instagram apps that constantly show me posts that i've neither subscribed to nor I am interested to see. It's a shame.
There is an option in revanced manager to patch reddit sync to use your own oauth client id. I just tried it out and the patched reddit sync just crashed when it start loading the frontpage. oh well.
I actually tried with latest version of Sync Dev already installed in my phone. What version are you using? Also, which google docs? I only follow the instruction in revanced manager that said to put the client id string in /data/storage/emulated/0/reddit_client_id_revanced.txt
Here's the full instructions.
Also, you have to uninstall all versions of Sync before you start patching. The guide I linked has everything from creating your own API key to running the patcher.
Yes, it's initially made to patch youtube. The recommended youtube apk to patch right now is v18.19.35, or you can download pre-patched apk of youtube here: https://github.com/revanced-apks/build-apps/releases . You'll also need to install Vanced MicroG if your phone is not rooted.