Hey Mate,
As you said right in the title, it souds like you are playing too many tables.
Here is a video to sort of test whether you are playing too many or "not enough"
https://www.youtube.com/watch?v=8Rwk9_mVs1c
To play so many tables effectively you'll mostly be relying on your HUD stats rather than player notes (since the software is collective the data for you) and player notes will often be added post game when doing review.
They can also be made when you see something really huge go down (and usually the HUD stats will have already been alerting you to pay attention to that player).
These days... I like to play 1 table (and I used to play 8-12 no problem). It's just a more enjoyable experience and i'm picking up more, feeling present, less stressed, more enjoyment.
Everyone is different and I hope this video will help you find your sweet spot
Remember... it's not only about maximizing your Expected Value
sometimes it's about maximizing your Enjoyment as well