Yes, it solely has a lack of power or an insufficient ground.
This does not necessarily have to do with just wires though, a damaged or unextended antenna will give the same issue.
The bad reception is 100% lack of power, but lack of power can be caused by a bad ground. Unfortunately, this is not something you can simply pinpoint the issue. Recheck all your wiring, make sure everything is attached correctly, no electrical tape connections, proper pressure grounds, proper power wire thickness, etc, just double check everything.
You could also try touching your antenna while driving to see if the reception gets better (no joke).
Tints can also screw up signal when they are installed. Also, you know how on the rear window there's the copper lines to defrost ice etc? In school, I've learned to place antennas inbetween those, because over those could lose you up to 1 volt. Therefore, you must also check to see if your wires are crossing through any other power source.
on the radio harness, hook up blue off the radio to blue on the aftermarket honda harness adapter, i have a feeling this might be the biggest issue, that it's not getting power. So take the remote wire and hook it up to the antenna power
If you can't figure this last part out, take it to a shop and let them know that your antenna isn't getting enough power, they will know what to do from there

Try an antenna booster if all else fails