This happens to a lot of people. Honestly, I find nothing wrong with it.
Maybe try to narrow down the type of sims you like play. Are you a rotational player that rotates at a specific time, are you a rotational player that really doesn't care and you rotate when you get bored. What if you never play that family again? Move them out of the house and mark them as unplayed and use them as townies. Or leave them there for just in case purposes. Along these same lines are you family player? Do enjoy raising children? Do you prefer teens over children? Are you the type of player that likes single sims, aging off, lots of girl/boyfriends and drama? Do you need/want lots of different gameplay in one save? Perhaps you're a mods type of person MCCC is your thing? Hate needs? Disable them.
Maybe you need a basic timeline or outline for the sims you're playing. Perhaps set up some specific goals for your sims. Then work through them. Turn aging off and perhaps get them to the top of their career, start a club, master a couple aspirations. Maybe the single parent home is your thing. Struggling parent making ends meet with rowdy children. Too much money cheat...money x will also subtract money from your sims account.
Use other peoples challenges but do them all in the same save.
Or simply use discipline and make yourself play a household for a total 1 real life week before making a new family. Challenge yourself to see how far you can get.