Honestly I feel like taking care of our kids is really easy and I want to brag to my wife about it.
Really, why would you want to brag about something like that to her?
She always complains about how much work it is and now I know she's exaggerating.
I know you think it's easy to take care of your children, but your wife may have a more difficult time taking care of them. Just because it was easy for you doesn't mean that it's easy for her. It's wrong to judge her for saying it's difficult to take care of the kids.
She should learn to cope with whining and complaining better.
Well instead of bragging to her maybe you should be there and be more supportive to her. Give her tips on how to deal with these types of situations and things of that nature.