Do you have a link for the adapters you used? It sounds like you may have used more than one of the cables you linked to. If that's the case, the adapter (coupler) you used to connect the cables together could be the problem.
»www.ebay.com/itm/3209198 ··· 39.l2649 those are the adapters i used, and they work for one tv that is hardwired to the box just not the main one, i think the one connected from the main DVR box to the router has a stronger type of ethernet cable
There is no "stronger" Catv5e cable. There is a distance limitation, but most people wouldn't exceed it in the average home; I think. Without a device like a switch, the maximum distance of run is ~330 feet.
the original wire that ran from the main box to my router has this writing on it "AWM 2835 24AWG 4PRS 60 degrees C 30v E312705 CAT5E UTP TIA/EIA-568B 2 All Systems Broadband UVA" I'm not sure if any of that sets it apart from normal ones, I just tried unplugging this one and continuing the cable i had to it in hopes that it may work.
Do the lights on the router light up when the cable's plugged in? If not, they may of sent you the wrong coupler. Couplers for phone wiring will NOT work as they "mirror" the wires (pin 1 becomes pin 8, pin 2 becomes 7, etc).