Amazon free time/kindle

Is it just me or are most of the books and games on Amazon free time not worth the subscription? It seems that most of them are very low quality and many don't even work properly.

If anyone has found amazing games and books, please let me know what they are! I feel like this thing causes more tantrums than it's worth.

Otherwise, I think I'll just cancel. One year came free when we bought the Kindle, but so far I haven't seen anything with paying for. We can get the videos anyway because we have prime.