Before I explain what I mean, let me explain what I do not mean. Those who came to do a startup because they wanted to break out of the system or didn't fit in are not escapist by my definition. Neither are those who wanted to "escape" the corporate culture and belong to a smaller team. All those are good kinds of "escapism".
The bad kind of escapism is the one because of which your customer service sucks. Or because of which you haven't followed up on that lead that opened up couple of weeks ago. Or the one because of which your product is never ready to ship. Since you are your own boss in a startup and there are always more on your plate than you can handle, it is easy to keep picking up things you feel comfortable with, things which look like fun and in summary, things which are easy for you (they may look hard to others). If you are a techie, you can always keep working on the next feature believing/hoping that after this your product will be market ready. The truth is - it is not the product, it is you who is not market ready. Or if you are a salesman, you can keep selling your product while relying on outsourced developers and not understanding one bit what goes into it. Since nobody is going to grab your neck for it, it is easy to just let go of that one bad instance of customer service and not call back, not follow up on it. Nobody likes to talk to angry customers. It is easy to escape when nobody is holding you responsible for it.
Entrepreneurship is not about starting your own company, it is about the attitude with which we approach the world, our daily life. Are we pushing ourselves everyday? Are we stepping out of our comfort zones? What new have we learned in past 1 month? Honest answers to these questions may not give you a successful startup but might make you a better entrepreneur.