Okay, so imagine you and your friend want to share a toy, like a toy car. You both agree to take turns playing with it. But then your friend says they don't want to share anymore and they want to keep playing with the car all the time, even when it's your turn.
That's kind of like the inherent bad faith model. It means that someone is not playing fair or not keeping their promises. They might have agreed to do something or follow certain rules, but they're really only thinking about themselves and what they want.
It's like if you were playing a game and someone kept changing the rules so they could win all the time. Or if someone said they would help you with something, but then they didn't actually do anything to help.
The inherent bad faith model is a way to describe when someone is not acting in good faith, which means they're not being honest or trustworthy. It's important to try and recognize when someone is not playing fair, so you can either talk to them about it or maybe not play with them anymore.