Can’t Solve Low End / Bass Issues with 4.5

After hundreds of rounds of testing I feel like I can’t get 4.5 to consistently produce an even decent bass section. Like 1/20 will shine and be unreal good, but the other 70% sound insanely muddy.

For context I make a lot house / tech / electro stuff.

Has anyone nailed a system for handling low end frequencies in electronic tracks?