Google‘s (and Facebook, and all the social media ad companies’) business model is predicated on the notion they have a better profile of their victims than the other ad network. They’ll never tell your uncle about what you search for at 2am, but they’ll indirectly sell it.
The best thing to do is to run a wired backhaul, if it’s remotely possible. MoCa or power line adapters are possible options but do your research and assess your own situation. Wifi is more complex that it can seem on the surface, and wireless backhaul adds its own nuance.
With higher end products you may find that you don’t need a mesh network - just one AP may solve the problem. All my neighbours have f’ing extenders which take up a ton of airspace and the houses are 30sqm footprint.
Ubiquiti makes the UniFi line which is prosumer. You’ll need several components; unless you’ve got more than 1gbps service, the UDM is a good starting point. They also make the amplifi line; I don’t think there’s a lot of positive feedback on those products.
Tplink is a Chinese company and therefore immediately suspect in some eyes, but their Omada line is pretty reliable. They also make the Deco line for more home-focused solutions. They’ve been in the news a bit lately, more so because people don’t change passwords from what I recall, but I wanted to mention it.
The amplifi line is the plug and play line closest to the google/eero/etc. experience. It is specifically the one I was referring to which has less than enthusiastic feedback.
I neglected to mention Mikrotik. They’re a Latvian company that is also in the space. I think they’d be farther to the professional/complex end of the spectrum. Omada is in the middle, and Ubiquiti leans toward the easier to use side. They’re all going to need more work than google wifi, unfortunately.
The “other” site has a wealth of information; evanmccann.net is a good source for demystifying their product line as well.