I am sorry that happened to you and I have heard stories like that before. I have also stayed on a Disney deluxe hotel and checked into a room that was not clean as I would have liked but a quick phone call remedies that problem.
You should have called the owner immediately and your issues should have been taken care of. He could have called an exterminator for the bugs, sent the housecleaner back out, etc. Also you can post a review on Trip Advisor.
I always tell rentors to look at cleaning fees, for instance you can't clean a 4 bedroom house for $125 or $150 dollars, the house will be dirty. Look closely at pictures alot of people don't do that which can tell alot about a rental. If you PM me the listing number I would be curious to see. Did you call the owner and they refused to take care of these issues if so then contact VRBO directly and they will open a case since you think it is misrepresentation but unless you called the owner immeditely upon arrival and gave them a chance to fix the issues then you shouldn't complain. If you called and they did nothing then you should complain.