Hey don't be too hard on yourself - those king's pawn games when they open up are hard to evaluate even for people like me. A lot of it really revolves around calculating lines.
For example on move 24 the position is really complex, I'm not sure i could find the best move. I could find a good move but not a great one.
You played well, dont worry about it too much
After some issues with the Tournament Organizers, my online classical tournament has started back up again. This match was against the #1 seed and was a really tight game all the way through