The 21-year-old Leeds forward is now back at Elland Road after a loan spell at Bury.
Indeed, Evans is uncomfortable with the fact the young forward was brought to Elland Road over the summer only to barely be given an opportunity before being loaned out.
As such, the Leeds boss will likely look to utilise him as much as possible now that he has returned.
The Scot told reporters: "I’m not one to give criticism but, if you buy someone out of Motherwell who’s built a nice little reputation for himself, the minimum the kid deserves is an opportunity, not being shipped out."
Whoever it was who sanctioned the Erwin loan, it's pretty clear Evans is once again serving up what can at the very least be considered an indirect criticism of predecessor Uwe Rosler.
And it's a fair criticism. There were some things Rosler did right at Leeds and many he did wrong. But the fact he didn't give Erwin a decent chance is certainly something he will be remembered for for the wrong reasons.
The Scot will likely do just that and give the 21-year-old an opportunity within the Leeds first team and we'll see whether the summer signing is ready to deliver for the Whites.
United travel to Huddersfield Town for the Championship's early kick-off and Yorkshire derby on Saturday.