I would have to agree with the post that recommends checking the cartridge alignment. If you've spent time with a turntable that has all the adjustments you'll discover that they are critical. There is definitely something amiss here.
Perhaps you would like to share the exact models of the items you are using for vinyl playback and who/how the cartridge was aligned.
Until you get this right you really can't expect your vinyl to perform at a high level. You can try yourself, but I can tell you, as a 61 year old music lover who has been in the audio business for over 40 years, it took me a decade to be able to setup a turntable properly and understand what I was actually doing.
I've setup thousands of turntables and I have yet to hear an MP3 through any system that rivals the performance of a mediocre turntable that is setup properly.
I'm not a vinyl fanatic, but I will continue to use LPs as my reference until something comes along that is in the same realm of performance and more convenient to boot.
I'm happy to say that I've built a music computer that is getting very close with good source material. Last but not least, Paul Simon recordings although musically excellent in almost all cases, are all over the map. This is something that is easily perceived when all is good.