My best rounds of 78, and a few 79's started with doubles.....the 78 actually started and ended with doubles and one of the 79's finished with a triple 😡 And some of my worst rounds have started with birdies. A few holes doesn't really dictate the whole round at my level.
I do recall being sort of distracted from the score on my best rounds. The 78 I just had a goal of not embarrassing myself playing with 3 really good single digit players. After starting with an unlucky double I was just trying to make no worse than a bogey.....which led to a lot of pars and me beating 2 of the 3 players. Not sure about the other rounds except that I didn't know the score until it was over.