Sonic 06 can maybe be fixed at a technical level but not at gameplay level, yeah. Tortured myself by playing it through it twice and when you do know how to handle the game (don't do XY or the game freaks out, avoid jumping here, don't touch the analogue stick here...) a few Sonic parts can be quiet enjoyable but the rest of the game is such a shitshow. I even played ALL of the side quests for Sonic's part and it was one of the worst experiences I've ever had in a videogame. It's interesting to read about the development and people trying to "fix" it though.

I did what I could... but there were many complex issues involved with development, as you might imagine.