I bought "Sunshine Dreams" on vinyl and the songs on it sound very bad

they do not sound like the real mixes of the songs, they sound like cassette tape copies or somehting, for Example "Good Vibrations" and the songs from "Pet Sounds" sounded really trebly, with hard "S's" everytime they sang something with an "S" in it, it sounded like the recordings were "peaked" with the volume too high... it was a huge disappointment to my ears..