It happens. You should really try the player before you give him much attention. I like to see how a player performs 'out of the box' before I change anything.
Ofc bear in mind that the orders, formation, opposition etc also have a say in how a player performs (you cant expect a 9 from an MC with blue arrow in an attacking wing-based formation playing the long ball) *extreme example I know but you get the picture*.
But those ratings would see him immediately kicked out my team, now.
PS One I had on an old alt team. He was a 6* previous season and barely average but after this start I just couldn't put up with him any longer.
I had a DMC I tried to improve because I was stubborn and couldn't admit it was futile....he got 4s n 5s n 6s with occasional 7 - always giving away dangerous FKs (but I was in denial). Can't find the pic though.