Why did you buy SSR? What was appealing to you about it? Did you do your research ahead of time? Did you know about resales?
If you bought SSR because you like the theme, the location, the laid backness, the room decor, the 12 extra years, the lower point structure over BCV/VWL/BWV (preferred) - then you probably didn't make a mistake. There are plenty of people who didn't buy points that were available at BWV/VWL/BCVs and chose SSR when it opened because it appealed to them.
If you did your research ahead of time, if you knew that you didn't have to buy what Disney was selling, if you knew what the other resorts were like, if your choice of SSR was informed, then you probably didn't make a mistake.