I went in to delete mine. Was forced to put in my real name and current employer without any way to opt out. So for a short brilliant moment I was Bobo Bobolicious of Bob's Boat Oars
I created my Glassdoor account about ten years ago. The only information they required at the time was an email address
An email address is usually also directly linked to your identity.... I wish more companies would not require it to signup... I do have throwaways and email accounts created using Tor though.
anonaddy, firefox relay, or something similar might be your solution. Many email providers provide temporary mails and permanent aliases as part of their subscription.
Not an email service per se, but rather an email-forwarding service, and offers unlimited duck [dot] com aliases with their browser extension and/or mobile app.
I have used their email forwarding service for a while (it is quite decent) before moving over to Firefox Relay.