Thanks for the recommendation, seems that many people share your experience. Any learning resources that comes to mind if you would learn RoR from scratch today?
https://guides.rubyonrails.org/
Other than that you might find something interesting in on reddit.
https://www.reddit.com/r/rails/
The changes for frontend development between Rails 6 and Rails 7 are so huge that it doesn’t pay to get an old Rails 6 book right now.