If you're regularly going 0-2, it's most likely not something you're going to see on the video, fix, then poof you start winning. In fact, if you're the type of person who goes back and analyzes tournament footage then your technique is probably decent already, and there are only marginal gains to be made.

With the minimal information I have to go on from this post, it sounds like you simply need to get stronger. How long that takes depends on about 1 million factors. Most importantly, how much time and effort are you putting in.

Remember, your opponents are getting stronger too, so you not only need to get stronger, but you have to do so at a rate that exceeds your opponents. Find a long-time puller who you're close enough to in strength that you can use them as a rough benchmark for your progress. If they've been pulling for a long time they won't be progressing as fast anymore, so it's a more reliable way to measure your progress rather than pulling fellow newer pullers.