When your workout feels like a failure?

So today is fb 30 day 10. I have done this program before, but always did the alternative beginner exercise. This time I am doing the hardest version. I have lost a significant amount of weight and have worked so hard to get fit and strong. BUT this workout today... man I feel like a failure. I got through it, I did most of it. I had to modify so much, though.

I have no idea how Daniel did that because I almost died a few times.

Is it a failure if you take a ton of breaks and or modify everything? Like lizard hops, I have no idea how to do that at the end of a workout, but I moved my feet and hands as best as I could. So should I do another workout, even though I did make it through and did complete it? I am a sweating puddle of a mess, but I feel like I didn't do it the way the video showed, so is the workout a waste of a day?

I know I am overthinking this. I just have never felt so like I really could not do it before today.