You are struggling way more than you need to in both chambers, but mostly the first one. As with many others, you are just one portal placement away from solving it within the first 2 minutes. The problem that leads to your frustration (I presume there was some) is that you didn't learn from your failed attempts, instead just kept repeating them as if you did something wrong. In the second chamber you seemed to be doing well enough, you lost the cube due to my bad clipping, but aside from that it was good. The way you got to the exit was very complicated though.. you had the right idea but bad execution.