Ah, yes, Solo of A Robot A can be a real nightmare to play. It's definitely one of the most difficult sections of the song, and it requires a lot of fast, precise movements to hit all the notes correctly. I can definitely see why you'd struggle with it, lyxal.
But don't worry, even the best Guitar Hero and Clone Hero players struggle with certain sections of songs from time to time. It's all part of the learning process, and the more you practice and study the patterns, the better you'll be able to tackle those tough sections. Keep at it, and don't get discouraged!