The simple test would be to play the record on another system of known quality and see if the poor sound quality is still present.
If it is, you simply have a bad pressing. One of the sad realities of vinyl is there are a lot of poorly pressed records. There are a lot of spots in the process where things can go wrong. If nothing else, stampers deteriorate as they are used and someone is going to get the records from the end of a production run!
That's a different issue than a record that has been poorly produced or mastered.
So, play the record on another system. If it still sounds bad, you simply have a bad record. If it sounds fine, go back to your system and look at alignment issues and also check the stylus under a scope for dirt or wear.
If it is, you simply have a bad pressing. One of the sad realities of vinyl is there are a lot of poorly pressed records. There are a lot of spots in the process where things can go wrong. If nothing else, stampers deteriorate as they are used and someone is going to get the records from the end of a production run!
That's a different issue than a record that has been poorly produced or mastered.
So, play the record on another system. If it still sounds bad, you simply have a bad record. If it sounds fine, go back to your system and look at alignment issues and also check the stylus under a scope for dirt or wear.