edegrott could you please provide your the support logs archive?
edegrott please run recalbox-support.sh from a terminal or find the equivalent option in the system menu.
edegrott could you send me the file after you run a ps2 game? I did not find anything strange in your logs. What do you mean by unplayable? Too slow?
Maybe your CPU is too weak?
Could you test with a more modern CPU with more than 3GHz (Intel Haswell or newer)?