Hehehe bedlam just as it should be
It doesn't sound like you resent them at all, it sounds like the normal adjustment to a higher number of hams to me. When I had two robos I used to get each one out every night without fail, my first foray into breeding I had thirteen robos here between 4 and 18 months old and I did feel overwhelmed in terms of giving them enough attention. The next cycle of breeding there were eighteen here and a Syrian, and I found peace with the fact I was not ever going to be able to get them all out, so settled more.
Nowdays I tend to get whoever is up and wanting to come out out, and leave whoever doesn't. They soon let you know, and tend to have different wants on different days. They can go through phases in their lives of wanting to be out all the time, and then for a while not at all. They are happy to entertain themselves most of the time, although at times some will beg for attention like Syrians do.
Don't worry and just enjoy, it's an experience you weren't expecting and you have a lovely little group to show for it. Whether you keep them all or not they are happy and healthy which is the aim with all litters so a job well done