He is a striker, and he plays 100% of the games. Of course he is gonna score some goals, so what do you mean?. Amauri and Iaquinta scored as much as him, and they even had other skills, yet they were hated as they were also too limited.
You can't judge a player just on the number of easy goals he has scored. Look at what he does on the pitch, how many balls he throws away, how often he is ignored by Ronaldo and Dybala in the build up as they know his technique and athleticism is not up for quick passes, check the goals he scored this season and tell me if 70% of them are not super simple tap ins or easy headers. Take any professional striker over him and they would have produced as many goals and assists. Even Kean would have scored more I'm sure.