You should absolutely not trust an ISP more than Google. Google monetizes your data themselves, while ISPs will pass it around to anyone with a couple bucks...
If data privacy is your goal, keeping both at arms length would be ideal... except most people can't choose how much data* ISPs scoop up, or even choose to switch to a competitor if they disagree with an ISP's policies.
*In contrast, you can control a decent amount of what Google collects on you.
That's what I thought abt Facebook and Twitter: It looks like they might ship anonymized (or not) data to third-parties when appropriate. Amazon, too, make a lot of data available to sellers on their platform.
Google could be doing that, too, in the guise of claiming to do something else. Or, it already is.
If data privacy is your goal, keeping both at arms length would be ideal... except most people can't choose how much data* ISPs scoop up, or even choose to switch to a competitor if they disagree with an ISP's policies.
*In contrast, you can control a decent amount of what Google collects on you.