On the surface, I would agree that it looks a bit like gender bias. When a woman is unemployed, judges often give her custody of the children because she has lots of spare time to devote to them. This guy is unemployed, but the judge refuses to give him even shared access because his life is unstable? I'd like to see this case used to fight women who insist on remaining stay-at-home parents after separation.
Digging further though, I see that the judge is just continuing the schedule the parents set up themselves. Status quo is what is ruling here, not gender bias. Also, he received SS from her, and still does not have to pay CS, which is not what you would expect if there was a gender bias.
Status quo is a killer evil, frankly. If it's in the best interests of the children to have equal access with each parent, and both parents wish as much access as possible, that should be the end goal no matter what the current status quo. Especially a status quo created unilaterally by underhanded means. If a judge thinks that the change would be too abrupt, there should be a transition period. Not just indefinite continuation of the status quo.