if you don't want a SM who pushes herself into situations she doesn't need to be, you must be bitter.
If you don't want to let SM take visitation instead of the dad... you must be bitter. Or controlling. Probably both.
If you don't cut your ex some slack on helping out with the kids he helped make because he has a new family going on... you must be bitter.
If you don't care about SM's kids enough to cut dad the financial slack he needs to better take care of those kids... you must be bitter.
If you say you hope the kids your ex's wife has are doing well... you must be bitter.
If you can't figure out when you're supposed to care about the kids vs. when you're not... you must be stupid.
If you feel the parents can communicate and don't want to talk to SM... you must be bitter. And want your ex back.
If you take care of your kids and have custody of them and there is no room for SM to "step in" ... you must be bitter and territorial.
If you dont' understand that "the more people that love your kid" actually translates to mom doesn't care enough about her kids to let me do x, y, or z... again, you're just too stupid to actually have kids since you obviously don't know what is best for them.
If your idea of "kids best interest" doesn't match up to SM's and you do what you feel is best without regard for what SM thinks is... you must be bitter.
Forget the fact that dad was probably okay with the way things were going until he had a wife to point out the error of mom's way to him, forget the fact that in most cases it is a SM who is married to the NCP who has most of these complaints, and forget the fact that kids are actually doing well without you changing things up so that new girl can feel important... cause if you don't forget all that? You must be bitter.