Why do kids not do anything I tell them to do? They literally do the opposite. I tell them they can't wear their good shoes to play out in. They do it anyway. I tell them they need to play on the back when I am cooking dinner and they disappear off to their friends house. I tell them to put their clothes away nicely and they just throw them in. I tell them to stop fighting and they continue to fight. I have tried various ways of discipline like time out, reward charts, taking things off them that they enjoy. When I tell them to finish their dinner even when it's something they like they will throw it out of windows or hide it in a bag or under things in the bin. They can't even follow simple instructions like wash hands after toilet, flush the toilet, brush teeth etc. They steal food they know isn't theirs, they sneak into my room to get their tablets when I have taken them away, they throw rubbish on the floor when there are bins all around the house and make a fuss when they are told to tidy up. I'm losing the will to live I can't deal with this anymore.
(They are my partners kids but they are the same with him) We have literally tried everything with no improvement. We are stuck between wanting to let them go to the park or play on their tablets so they are not making a mess or fighting etc but also wanting to punish them by keeping them in and confiscating their tablets because of their behaviour. Months and months go by and still no improvement and it's really starting to affect my mental health and I'm starting to not want to continue the relationship because I can't deal with the stress the kids bring me.
Any advice?