There aren't any cartoons left on the channel. That would be my guess. Okay, so there are, but they're not good.
I remember growing up watching Hey Arnold, Doug, and Rugrats, just to name a few. And I think, what made those shows great and what made them stick with so many kids, and what we didn't even realize back then while we watched them, was that those cartoons reflected real life for us. We could relate to Doug kind of being picked on by Roger--but Doug didn't solve the problem by beating him or making his life miserable. There were several episodes where the two we even friends, and the series finale has Doug comforting him.
We understood Arnold when he had that crush on Lila, but Lila didn't like him back. He stilled tried, he was still nice to her, and he didn't let it consume his whole life. He also didn't turn into a crazy stalker and send her threatening messages if she continued to refuse him.
Rugrats was all about using your imagination to go on adventures, and as annoying as Angelica was, the babies learned to deal with her and even got along with her.
Cartoons back in the day, while entertaining for kids, I think also taught kids about life by showing real-life situations. Things kids could relate to and teaching them how to deal with stuff without being preachy about it. Cartoons nowadays, from Nick to CN to so many others, seem to lack that. There are exceptions, certainly, but for every Steven Universe or MLP, we get tons of Gumball, Teen Titans Go, and Uncle Grandpa.