It's not just silencers - movies and video games are generally bad at gunshots. For good reasons - if you make them as loud as they ought to be, even to the limits of the recording equipment (since you'd need to go well into the hearing-unsafe territory), they'll drown out everything else.

There are exceptions. The famous shootout scene from "Heat" does a surprisingly good job at conveying just how deafening gunfire really is close up, for a movie. Although even that is much milder than it would be IRL, due to use of blanks and the aforementioned equipment limitations.

https://www.youtube.com/watch?v=ZL9fnVtz_lc (shooting starts around 4:20)