I had the complete opposite experience.
When I was working at a software house, we had a client with a Hanami app (version 1). It was one of the best-engineered apps I’ve worked on - much better than 90% of the Rails apps we were working with at the time.
The only thing I missed was better Dry.rb documentation.
Hanami follows very good design patterns, useful for bigger applications. You may not see the value immediately with simple 5 minute blog app but over time, when the app grows, the abstraction layers will pay off.