I have not had anyone say your other mics sound better.....but I imagine a lot of CBers would prefer a loud silver eagle over a better quality sound?
When you were a small kid, did you trust the adult that told you that pizza was great if you would just try it?
Same, same . . .
Now, if you on just AM then it will still sound better. SSB is great too. Expectations are everything. If you can't do the hifi setup the same way as others who have done the hifi thing have done (pro mic and preamp); then you can't say that it is bad or not. Perhaps you've never heard a fair example of what is possible; that is what I think. Perhaps you have.
Things have been changing in the kind of mics/preamps used by CBers over the last few years. Although the D104 and Turner+3 mics (I still have both of these - BTW) were once the mics of choice; they have fallen way to real pro mics and preamps. Hams have been doing it for years, and CBers have gotten hip to it too.
I've heard guys on ch 6 AM using freaking great audio equipment and blowing away all of the other mostly crusty-sounding junk typically found on 'the bowl'. So easy to understand them unlike over-modulated messes running massive power and just sounding perfectly terrible. Some operators are literally 'hung up' on the notion that more power is better; running amps well past their designed specs and bleeding over all of the forty channels. They ain't right; they have no clue.
I've used just 70 watts on a four element beam and talked to Moscow, Russia with a 5/9 signal report - from here on the West Coast - and got compliments for my audio and was asked what I was using - and how I did it. If I can do it; it can be done.
You've just put up a great 4 element beam too.
Many guys on ch 38 lower side band are using great audio gear all of the time too. The more DX you do on SSB (stations from Europe and abroad) you will hear it there as well. You won't hear me using a D104 any time soon. Not when I can use gear that has less audio distortion, much better freq response, and I don't have to turn up the modulation above 100% to do it all - either.
Then again, if you can't tell the difference or your radio isn't up to it - then it's not for you . . .