There is no exam for the AOW, but students do have to complete the knowledge reviews for each subject/dive they do. These knowledge reviews are the same format as the ones completed at the end of each chapter in the OW manual/course.
If you didn't do those, then you must report that instructor to PADI.
The AOW course is meant to be fun. But your 'fun' dives should be under-pinned by a greater theoretical knowledge and should also include a small variety of skills/exercises/demonstrations in the water to illustrate that knowledge.
It is not meant to be a demanding, skill intensive course. However, some instructors do choose to use the course as a vehicle to further develop the diving skills of the students. I do that. Several of the other instructors on here do that also. Many (most?) instructors don't, because they are not obliged to by the actual course requirements.
When I teach AOW, I attempt to give the student the best possible value. I identify the student's areas for development... but also their areas of interest. Then I consult with them about the benefits to be gained from the different dive options available to them.
I've run AOW courses that had different focuses or themes. It is a very flexible course that can be tailored to provide a Fundies 'lite' focus on core buoyancy, trim, propulsion and dive planning theme. I've run AOW that was entirely centred around wreck diving. I've run 'photography' themed AOW courses. etc etc
The 'weak point' of AOW, is that it can also be run as a mindless excuse for 5 fun-dives, with no developmental capacity.
As with all things... decide what YOU want to achieve... then sit and talk with your prospective instructor to confirm whether they can or will help you achieve that. If they can't, or won't... then find a different instructor.
For any readers who are planning to undertake AOW in the future... I do recommend discussing your goals here on the forum. There is a lot of experience here, that can help you shape your 'ideal' course. Then you will have a workable
model which you can take to 'interview' various potential instructors as a comparison.