Question about gigabit fios and alternative routers

After ordering Gigabit I bought the Archer c7 and the Google Wifi to test out wifi performance in my less than 500sqft. Installation went without a hitch, after the tech visit, I ran multiple speed-tests directly from the ONT (wired cat 6) and got speeds which capped out at 750/800. I then hooked up the c7 and it gave me under 50mbps (2.4) and 150mbps (5g). Google wifi gives me 40mbps (2.4) and 250mbps (5g). I tested all these steps away from the router and made sure only 1 device was connected.

I’m not that happy with the outcome. Did I do anything wrong with the routers I got, should I just rent/get a G1100? I did not have to copy the mac adress or release the DCPH for any of the routers, was that needed at all? Also is it odd that I only get ~750 down when connected straight from the ONT?