Disabling the ARM11 crash handler is not a good idea in the most cases. In the most cases the system will still crash at the same point just without any helpful message.
I've made some config.bin files for various broken button scenarios a while ago (ARM11 crash handler on!) :
https://gbatemp.net/threads/release...heir-l-or-r-button.473769/page-2#post-8398221
Attached to this post one with Rosalina combination (X)+(A)+(Down) and ARM11 crash handler
OFF.
I hope this works for you.
Have fun!
Edit:
I have to pack those files in a zip because the forum software does not allow uploading bin files.