Which Router did you buy?
I have been a fan of "prosumer" equipment like the UniFi line by Ubiquti for a long while. Their latest offering, Cloud Gateway Max, looks interesting. I then buy separate WiFi access points (like the U6 Pro or U6 Long Range). To get them set up in different areas of your home, you can either run ethernet cable, or if that is not practical, then use the MoCA ethernet over coax adaptors, which can be found on Amazon. These allow you to turn the existing RG6/RG59 cable TV wiring in your home into a gigabit eithernet network. They work like a charm.
I am using one gateway (one generation behind the one I mentioned) plus 3 access points (upstairs, downstairs, and garage), connected via MoCA adapters / coax. Speeds are awesome, and with three access points, there are no dead spots in the house. You can also run multiple wifi SSIDs. I have one for computers, one for devices (smart scale, Tesla, etc.), and one for guests. Keeps random IoT devices from infecting your computer network.
And once you have >500 Mbps, then you can skip cable TV, and subscribe to streaming services in addition to your Qobuz/Tidal/whatever.