Is perseverence overrated?

So, I'm working on a crochet pattern that I really wanted to make - for myself, even! However, it turns out that the pattern is written terribly and is, in some cases, just wrong. It's extrememly frustrating and I'm thinking of giving up on it, though I hate to lose all the work I've done so far.

This is the project and the yarn:

It's the "Living on the Edge" poncho from the Fall-Winter 2005 Family Circle Easy Crochet magazine. It's crazy busy, but for some reason I like it. Here's what I've got done so far:

I have 47 more rows/rounds to go. (And trust me, the colors work better together than it might appear in the photo. :) (And yes, it needs desperately to be blocked. That ruffly row of brown should be perfectly straight and fringe-like.)

I love this yarn, the Peruvian Collection Highland Wool from Elann, but it won't go to waste if I decide to quit the project. In fact, I'd planned to have extra yarn to play with, and I'd love to have even more now that I know how much I like this yarn. So wasting the yarn isn't a worry.

It's just so frustrating! It's not that the pattern is hard - it's not, particularly, just fiddly in parts. I thought it would be fun to do something that had a lot of different stitches and such, but turns out that an awful lot of it is very simple. Which wouldn't be so bad except the pattern is written so poorly that even doing a simple round of double crochet with increases becomes a challenge (because the counts never end up right, even following the directions because they're just wrong - it's mathematically impossible to end up at the correct stitch counts. And at one point so far, it was physically impossible, too).

So should I just bite the bullet and rip it all out and move onto something else that won't put me in a black mood the moment I even look at it? Or should I persevere?

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