You can always "cheat" and try the Liquorix Kernel, was very good for playback and removed lots of "hair" spikes on the Graph i was eyeballing, should be easy to install and try on Ubuntu if you are curious and in the mood
During startup, press (left?) SHIFT, so you can end up chosing what ever kernel you have installed, you can also try install, use Grub Customizer.
Also, if you check run the program Htop, you can see if your specific scenario likes SWAP or , what..
I am not on Liquorix anymore because all is good now, just a tip and because, if it even lags on Liquorix, then something else is up, kind'a-thing.
Ooops,
https://liquorix.net/#install
Type: uname -sr in the Terminal and you should see what kernel is in use