You haven't provided any. Other than petty whining about phone calls and SMSs. If they ask you who you're gonna vote for, tell them to fsck off. I deleted the SMS I got from them, just like I deleted the one I got from the ANC and the Gauteng government.
And the false equivalence is the issue. The ANC loot the country's coffers like crazy, fsck up the education system, fsck up the health system etc. but an unwanted SMS puts the DA in the same league. Oh noez!
Look at their actual performance in government. They are simply performing better than the ANC. Along with that the ANC has shown decisively (in my view) that they don't deserve to be in government. Therefore I'm also voting to get them out. Abstaining is in effect tacit approval of what they're doing, because you're not actively using your 'voice' to oppose what they're doing.
You're never going to get a party that you agree with 100%, or who will never put a foot wrong. Deal with it, and deal with the reality that we have, and see where we can help it to improve.. Don't throw your toys out of the cot and refuse to play like an upset child.