Psx games sometimes take a little longer to load because they took a little longer to load on a real psx. It was a cd based system. As far as the pixelated graphics, that's what they are. Most games were 320 x 240 and being stretched to 1080p will make it pixelated. That's just how the raw games looked. Try turning on bilinear filtering in retro arch. Or you can try the high Rez mode in pcsx