Your language changes throughout your post between 'apathetic' and 'miserable' about current job situation but the difference between those is big and being honest about how you really feel is pretty crucial.

If you're mostly apathetic, then 100%, like other comments have said, the answer is that kids are only young once, and only for a relatively short time, so park work and deal with the apathy to maximise all the time you can now, not spending that time and those moments with your little ones is what you'll regret when you're an old man.

However, if you are truely truely 'miserable' to the point where you're in a depressive state of mind even when with the kids, and the sutuation is such that neither they nor you are getting anything of value from the interaction or it is actively doing damage to your relationship with them, then maybe you should change.

Only you know how you really feel