Children need us to parent them effectively and to guide them into adulthood. We need to acknowledge our children's feelings and respect their opinions, but the bottom line decisions belong to parents. Children must learn to accept this reality. Expecting children to cooperate is much different than wishing they would. Your choice of vocabulary is the first method of conveying your expectations.
Tonight is bath night.
Choose the top 4 or 5 issues that you want to address right now. Create a rule to clearly and simply identify what behaviors you expect from your children. Decide an appropriate consequence for breaking each rule. At this point, you may wish to include your children and gather their insights and ideas. Older children, especially, will respond more positively to this arrangement when included up front.