@Orphelus The new error is the same as the old one. There are also a couple new USB 3 driver crashes in the new dxdiag, although I can't tell whether those were from before you saw my reply and unplugged everything. You can check yourself in the Reliability Monitor—these errors will show up as LiveKernelEvent 144, and their timestamps should make things clear.
For the issue itself, please test in a clean boot, again with everything unplugged except for your keyboard and mouse. Here's how:
https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd
The one service to leave enabled is the EABackgroundService, which the EA App needs in order to run. Disable the rest as described.
When you reboot your computer, go through the Task Manager's background processes list shutting down any service that doesn't absolutely need to be running, for example anything from MSI Afterburner to RGB software might still be enabled. If you accidentally kill a critical process and it doesn't restart on its own, just reboot your computer again.
Don't open anything other than Sims 4 and the EA App while testing, not even a browser window. If this helps, you can start reintroducing hardware and software in whatever order you like, testing in batches or using the 50/50 method, whatever works for you.