GA4 is not just a "new tool". The dissatisfaction with it does not stem from people not wanting to learn a new tool. GA4 has massive deep-rooted issues. Not only the UI, the data model, the way data is generated and processed, etc... See:

https://www.simoahava.com/analytics/dear-google-analytics-4/

or

https://thebounce.io/comparing-adobe-analytics-google-analytics-and-piwik-pro-by-emotional-state-during-usage-93ce9809edd