Is Ben 10000 better than the original Ben?

Generally things do get better with practice, don't they, and as Ben films and episodes have gone on, there have been more writers involved, so more brains put to create finer and finer work.

I'd say the later work is better, just as the first story someone writes is generally not nearly as good as their later ones. Just enjoy, and note what you think is particularly good in any episode.