I know a lot of people have friends or family beta reading their work, but they can be unreliable, and sometimes might even hurt your book if they don't know how to critique or they don't want to hurt your feelings. The smartest thing to do would have someone - a mere acquaintance, or an internet pal, to help critique your writing. Of course, it comes back to finding someone with the knowledge to help you, and so forth. Currently I'm without one. My friends aren't the literary type, my family is even worse...regardless I wouldn't trust any of them with my work...so I'm just curious how you found yours working on and on without critique will leave you with your faults, and chances of them improving being slim to none.