That is exactly my point is that removing the advertisements for 1 test won't give you a ready on the pass/fail that you're looking at. It is aggregated data.
However, What is performing horribly? What are your users having issues loading? Do you have an example outside of this tool? Often people get bogged down by these tools and get obsessed with them. Your site itself is really loading extremely quickly for an actual user.
With that said, there are things at a code level in our software that we are going to improve for V5. If that is more-so what you are concerned about, I would invite you to read up on some of the conversations that have happened on the community here about CSS and Javascript.