Robins, who succeeded Simon Grayson in midweek, saw Callum McManaman, Arouna Kone and James McArthur put the Latics 3-0 up before Lee Novak pulled one back.
And, although the visitors had to withstand a portion of late pressure, they were not unduly troubled and racked up a fourth when Kone smashed home his second in the closing stages.
"Our performance was okay, it wasn't anything spectacular," said Robins.
"They caused us a lot of problems with the movement and their quality, it was tough. It was always going to be a difficult game."
Robins, who must improve on his new side's record of one win in their last 15 league matches if he is to keep them in the npower Championship, added: "Their were some glimpses of some good football and decent movement.
"It's going to take a little bit of time to get the team set up how I'd like it, but there's some good quality in there."