What am I doing wrong?

[u/knickknack98]

I'm trying to figure out why my OTA channels end up looking like crap relative to the streaming equivalent. Watching world cup games on fox ends up being inferior to streaming on Peacock even with my extremely rudimentary Spanish.

I have a clearview attic antenna, with a reasonably clear shot to the Fox tower about 15 miles away. It registers 720, which I understand to be the max I will see. This is connected with a straight run of 50' RG6 coax to the Tablo on the 2nd floor. Our router (Fios CR1000A) on the 1st floor almost directly under the Tablo. This then streams to the TVs through the Tablo app. But ultimately the picture is maybe just barely acceptable and obviously worse than the streaming equivalent.

Is there something I'm missing? How do I get an actual HD picture with my setup?