I’m sorry to hear you had a frustrating experience.
I do want to note that we didn’t receive any support request from you via the WordPress.org support forum or our support channels. In most cases where GA4 isn’t firing, it’s related to configuration (Consent Mode, caching, multiple GTM/GA installations, or theme-level script injection), and we’re usually able to resolve it quickly once we can look at the setup.
GTM Kit is actively maintained and used on thousands of sites, and GA4 works correctly when configured as intended. If you’re still open to it, you’re very welcome to open a support thread and we’ll gladly help get it working