Why is my Striker Desment not scoring and contributing more

[wintersnow341]

I forgot to add more screenshots of my strikers scoring record so I have added them below.

Desmet scored 4 of his goals in the single game that had a really poor opposition so it looked high and his records since he was bought at the start of the season is poor.

Orfanov is my top scorer despite having lower stats all round and even Sdouga has the same scoring and assist stats with Desmet now even though I bought Sdouga in mid season.