If your hubs are substandard, it must be one of these reasons:
1. They had bad grammar.
2.They're too short. A hub should have a minimum of 400 words, with about 600 being ideal.
3.You didn't put enough extras,like pictures, polls, etc.
4.They were badly organized, without subtitles, paragraphs, etc.
5.When editing a hub, on the right side you have a toolbar with tags, summary, etc. make sure you fill those in.
6.You might have inappropriate content, like porn or links to porn sites, bad links, etc.
7. They might be in a foreign language. Hubpages only allows english.
Take a look at my own hubs for inspiration, i'm kinda new here too.