Why would you use your ISPs router? Mine is set to modem mode an do have my own router which is far better quality and also totally under my control security wise.
I'm surprisingly super happy with my current one. I got ATT fiber and was planning on swapping out their router and adding an access point but it's actually great and covered my entire house including the garage and back yard, and they don't charge a monthly fee for it.
I'm saying a router isn't going to protect you. You need to do way more than that, and what's actually needed is way beyond what you can expect any normal person to do. If you're just telling people your router is compromised without listing the hundreds of other steps you need to do, you're giving them a false sense of security, and frankly, nobody cares about the vast majority of us.
Google fiber and any other ISP that offers 1gbit or greater speeds are already giving with 6 routers, and 7 is soon to follow. Wifi 7 is already planned for Google Fiber and I know others have it on the way. Basically any ISP offering >1gbit speeds is going to have a wifi 7 router soon.