Determined Underachievers I discovered when teaching Maths in school, that many who struggle with a new concept have no idea what the problem is, they just feel blocked and often react by trying to avoid the discomfort that invokes. This leads to a lot of stress for the learner and massive frustration for the teacher. Learning to Ring is MUCH harder than learning Maths. But, across both worlds, the key to shifting these blockages is to identify the missing micro-skills and work on those first.
I have watched many (older) people struggle to progress beyong plain hunt and I believe that we expect them to pick up a myriad of micro-skills by magic, much faster than they possibly can.
The danger is we may over-focus on ropesight and memorising the circle of work, when the missing micro-skills are mostly around bell handling. The plain hunt they have "mastered" is actually badly struck. They are not yet ready for bob doubles!
Progress can be made if you do bell handling exercise such as "rounds and back rounds" (which teaches people to hold up), and break plain bob into separate sections by ringing "funny bob doubles" instead. This method lets the learner ring for example 3-4 down repeatedly during a touch, and once they are confident, progressing on to 3-4 up etc.
https://ringingteachers.org/application/files/8316/1426/5228/Funny_Bob_Doubles.pdf
These lessons have definitely brought some of my friends on - their striking has improved for call changes and plain hunt, and they relish the progress they are making.