Based on what you posted, I would say go ahead and cancel. At least cancel and then do your math/calculation to figure out if DVC really works for you based on your vacatinoing habit and financial situation.
My parents almost bought DVC back in 2002 but at the end didn't for whatever reasons. Yes, I sort of regret that they didn't buy it, because it would've been so much cheaper back then! But do I really regret? Probably not. Because we were not tied to DVC or Disney, I got to travel around the world for holidays with my family. I appreciate having the option to be flexible and certainly am thankful that I'm lucky enough to have been to so many different countries. If my parents had tied us all in with DVC, my memory in high school and college would probably be Disney only.
Fast forward some years, I've finished school and lucky enough have a decent job. I bought DVC onboard a cruise in 2009 - no financing. Even though I didn't have the intention to go to WDW regularly when I bought in 2009, my calculation said that if I use DVC primarily for the Club Cordial resorts in Austria every year/2 years for my ski holidays, this would still be a very good deal and pay itself in 8-15 years. However, when I got home, phoned DVC and started looking into actually booking for Club Cordial (or least plan for that), I discovered something problematic - the Club Cordial exchange
point chart was never published early enough! I was told that DVC won't have those points (and hence can't make booking) for the following year until something like in the fall of the previous year. Now, ski season would be Jan to March in Austria and given that it's a prime season, I highly doubt that I'll ever find any availability given the limitation as to how early I can book those stays. I called DVC and asked to cancel the purchase before the 14-day period ends. The attitude of the lady on the phone was not the best - very different from when I met her on the cruise! She's not a guide, but she was like one of the two others working with the guide on the cruise. My guide wasn't available when I called. Anyhow, I insisted on canceling and that's it. No more DVC.
A few years later, I bought Aulani while we were vacationing there. Priorities have changed and despite us currentyly being roughly a 24-hour flight away to Honolulu, I am just so in love with the island. I bought only a small contract so that we can go once every other year or so. One other reason that I bought it now is because I figure that with (hopefully) kids coming in the future, it's probably cheaper to own today than to buy 5 years from now - if I will definitely buy 5 years from now, then it makes sense to just buy today (given that I have the cash today already - could be different if you are financing today but would have the cash later).
Now, do I regret canceling in 2009 now that I am an owner? Yes and no... Yes because I was buying GVC in 2009 and it would've probably been easy to re-sell those (given the sold-out status)
No, I don't really regret because it simply didn't suit my needs at the time and it does now. I don't remember exactly how much per point GVC was when I bought in 2009, but I did get a good deal at Aulani with the special offer which made it a rather good value direct purchase.
Perhaps if I ended up having to pay more, I would've regretted more for not keeping my purchase in 2009.
Anyhow, the bottom line is, you should only buy DVC if it makes sense. When in doubt, best to cancel it and think through the purchase again.