I dont think it is that easy to define "unjustified denials". People might agree on a vibe, but not detail. What would a bill look like?
Regarding the party and representational system, I agree there is a lot of dysfunction. Same problem. Nobody can agree on alternatives. Even ranked choice, which I think is the tiniest step in the right direction is highly controversial. Ideas like expanding the house to 30,000 representatives [1], seem like a fantasy.
People hate change more than the status quo.
Regarding the media environment, the consumer is the problem. As long as people prefer and seek out garbage, there is no possible solution.
[1] https://thirty-thousand.org/