Say you are working on a project, but you can't seem to make progress. At some point, you tab over and read HN or reddit for a while.
Now you have two choices: A) Hate yourself for it. B) Not hate yourself for it.
Lightning struck - you were unable to continue working. There are a number of ways to deal with that, a number of lighting rods to take away the pain from the impact. Some work better than others. Some might even make more sense than others. Procrastinating may not make the most sense.
But the problem is not that you were procrastinating, the problem is that you couldn't continue to work. In procrastinating, you were coping. Your brain told you in rather strong terms: "This is currently not working out and there is no way this is going to get better if we continue staring at it. So let's do something else for a little while."
What you should not do is hate yourself for setting up a lightning rod. Because hating yourself does not increase your chances of being productive. Most of the time what it does is the exact opposite - you're simply increasing the pressure for the next time you get stuck on something. The higher the pressure, the higher the chance that you will grab a coping mechanism from the lower shelves of your arsenal.
It's a cycle of self loathing that only has one out: Stop punishing yourself for not succeeding and instead figure out ways to make it more likely to succeed. Hating yourself is easy, hating yourself for browsing reddit is particularly easy. What's hard is helping yourself to enjoy yourself.