What makes a bad project sponsor?

If the sponsor can't see a fair return for his/her contribution.

All projects need a project sponsor, and getting a good one can make or break a project.
The project manager who is saddled with a sponsor that doesn’t care about the outcome, has no power to make decisions and can’t give you any resources is in a very difficult situation.
Many experienced project managers have had to put up with awful sponsors – ask someone with a few more years on the job than you and you’ll soon hear some horror stories about project sponsorship.
So what sort of sponsor should you avoid? First we should look at what a project sponsor is for.

Simply said, good or bad sponsor is likely to be dependent on the project manager, I understand that there are project sponsors who don't want to get to meetings, to read reports, some cannot be bothered being on your side, and is simply do not have enough influence to make the project work, and so many other cases.
A Project Manager will always try her/his utmost best to entertain the needs of the project sponsor, if reports are too long, try briefing, if a2 hour meeting is too long, reserve less time with continuous time with her/him, and you will try to create a sense of urgency to your sponsor.
But, as a project manager, you need to be able to judge right from the beginning while preparing the project charter, if you find it hard to deal with the sponsor, or you see he/she does not have enough influence and power to change, look for another one (if its an internal project, and still didn't reach the CXO level, if you are sourced, you have the option of rejecting the project), if he is not willing to read the charter, it will be more likely that he wont respond to a change request, a progress report, or others.
However, you cannot just blame it all on sponsors, it may be the case that what makes a bad sponsor is bad usage of project management and communication, as some project managers overcommunicate, or don't communicate at all, they may not provide a business case for a change, they enjoy complicated progress reports, they overdo risks and issues register (even though I saw many who fill the RI register only on the initiation phase of the project), and overestimate impact of things, they have poor plans.
there are plenty of reasons to make the sponsor make bad choices, you need to make sure it's not you?