The early episodes were great. They showed the babies as imaginative and there was enough subtle adult humor for the parents. It was a pretty fun show in that aspect for the first 4 seasons.
Then when Nick revived it, it began focusing exclusively towards the babies and Rugrats merchandise was shilled fucking everywhere. The first movie came out and it was a big success (and it was pretty good too since it was Hamlet with Babies). But the show went to complete shit when Dil was introduced and would shit up episodes with more crying.