Anybody who says it's got nothing to do with ads is a numbskull.
Two things can help here..
1) Block Ads
and what most people miss..
2) Block those pesky social widgets
Adblocker will do both but you need to proactively set it up to do so.
1) Install Ad Block plus
Set it up to block the widgets and easiest way to do that is follow the instructions on many web sites. A good google search is 'block social widget' or something similar.
What you need to do is use the filter list here
https://monzta.maltekraus.de/adblock_social.txt
Should speed your system up a lot.
If you understand how the WWW works, and how browsers work, it makes sense.
Nothing you say makes sense.
It does though Joe,but I'll reserve judgement on whether it makes a difference to the speed.