I’ll throw in incompetent owners and managers. People with no or little restaurant experience that think they can do it.
I like culinary grads who use Daddy’s cash to open a place. I can think of a few examples here, including my best friend.
Drugs or alcohol will hurt if either the help or management abuse it.
The only bad location is one where you cannot turn into the parking lot from the main street.
It is not competition that is a problem. I love it, as it makes you try harder to be the best. If you have other restaurants of the caliber of what you are selling, I feel that it actually enhances your location as a destination.
It helps to have good restaurants next to you as it makes it easy to borrow something when you run out of it in the middle of a rush.[;)]
As for xoox, do you get BBC TV in India? Watch ‘Ramsey’s Kitchen Nightmares’ to see how many ways that running a restaurant can screw up. I’ve been in this business for over 30 years and I love it. You can find the episodes on the web too.