Hi @JSuciu ,
Don't worry, you won't brick the processor, unless you burn the fuse.
Now, your issues is download the invalid image to the flash cause the boot issues, you can follow my document to recover it:
https://community.nxp.com/t5/i-MX-RT-Knowledge-Base/RT-board-recovery-for-debugger-connect-issues/ta...
When you do the TCM configuration, please to avoid the ROM used TCM,

You also need to care about the flashloader used TCM, eg, the flashloader in the DTCM, but you set the DTCM=0, then you also will meet the issues, as the debugger flashloader no space to download the code.
Wish it helps you!
If you still have question about it, please kindly let me know.
If your question is solved, please help to mark the correct answer, just to close this case.
Best Regards,
Kerry