Thank you for the detailed description and taking the time to figure out a solution to your problem-- I don't have an AMD card to test RTST with myself. I'll also probably end up linking your post in our troubleshooting section.

Getting OBS to actually pick up RTST's overlay using game capture is difficult and requires a specific order to work and if it does work will often break right after an alt-tab. OBS's hook is likely triggering first and capturing the frame data before RTST draws its information.

One thing I have been slowly working on is improvements with the hooking process which can reduce crashes and help compatibility with other programs. Finishing this would likely fix your original crash issue all together without having to add an exception for ps2. It could potentially help with obs as well, and any other software which has had problems while running with RTST. The real problem ends up being this in itself is one of the most time consuming and complex systems to develop, dealing with largely low-level operations. I responded here with some more information about an improved hook.