Advice re: professional association

I am the (volunteer) webmaster and "Chair" of the web committee for a professional association that I belong to.  It's for a group of law librarians, if that matters, and is the main professional association at the local level for someone in my type of job.

Last year I was both the chair and the main Webmaster, with backup help from someone else on the committee.  This guy turned out to be a twerp that acted without consulting with me, didn't follow best practices> For instance he created new pages not using our template with no warning or notification afterwards.  After many problems that he caused (i.e. breaking our home page...) I finally wrote an e-mail saying that it wasn't working out and we needed to find a resolution.  I spoke also with the current and incoming president about this and they seemed sympathetic.   This was in April.  I said I wanted to continue, but if I had to keep working with him I wouldn't want to.

The twerp at fault is also on the executive board this year (Member at large, sort of a made up job).   At a recent board meeting, I was told to give the twerp the necessary information to access the web server so he could continue as my back-up (they had changed recently).  I was stunned, after expressly telling these people I didn't want to work with him.  I sent an e-mail later thanking then for reminding me to setup a backup, and I would train in another person (which I had discussed on the phone in April) right away.  I was told to wait as the executive board discussed the future plans for the committee. (??? - with no feedback from me).

Now, suddenly, the executive board has decided that there should be two separate people:  the "Chair" who manages things and the Webmaster who makes actual changes.   I was annoyed because I like the Webmaster work and I was also getting an icky feeling about this new level of control.   I was ready to give up but decided to stick out my term as promised.  I said "Okay, I will be the Chair and the backup person I named earlier is willing to be Webmaster."  Again, I am told to wait.

I just got an e-mail saying that they want me to be the chair and they have asked a third, not discussed until now, person to be Webmaster.  I don't object to this particular person, but I think it's wrong that they assigned her without consulting me.   I think they may also be tolerating me, so that they aren't the mean people asking me to leave.

So, what do I do?  I think my options are:
1.  Be really nice and just go along with it, knowing I will see these people everywhere.
2.  Resign and tell them how I feel.  I am not interested in being the chair of the committee if I cannot even have the option to appoint people to do the work not to mention how they handled it.
3.  Make an excuse to quit that everyone can feel good about. I can make up a story about pressures at work, time, etc.

Sorry this is so long, but I really hope someone will read and give me advice. I can't get unbiased advice from people who know me directly.