For a long time, most of the Armstrong material released on Mosaic- his work with Decca and RCA primarily- was sen as lesser or inferior Armstrong (certainly compared to his revolutionary work as a younger man. That view has been challenged recently, led by folks like Ricky Riccardi who has written a 3-part biography of Armstrong and has contributed to a lot of the Mosaic liner notes. The argument is that critique of the later Armstrong rests in part on the uncertain boundary between jazz and popular entertainment, particularly jazz as it exists post-bop. Nevertheless, you wouldn't be alone in seeing Armstrong's Mosaic material as somewhat peripheral to mainstream jazz.
If you don't like *any* Louis ... well, what to say, tastes differ. 😉 I would just finish by saying that early jazz often takes more "work" to enjoy as a listener, in part because of recording quality and in part because it is musically a step removed from the musical world we live in in the 21st century. In my experience you have to get past its inherent oddness to appreciate it on its' own terms. Nonetheless, as I said before, tastes differ.