Hi, we had to remove ESET before installing our own AV at a few of our clients. The issue was that it couldn't be done without the uninstall password, and the only workaround was to reboot into safe mode and run a script provided on the ESET support site to remove it without the password. We eventually contacted the old MSP and were able to work with them to re-hook up their ESET plugin into our platform and push the uninstall command, that got most of them. They couldn't give us the password. It was a manual removal by field techs to get the remaining ones. Not a fun project.
For your specific issue, you might want to reach out to ESET support or check their website. I would assume they have something already, given the above experience.