SOLVED. YA fiction. A kid has to navigate life due to his Grandfather's degrading mental stability, Spoilers. [s]

[Sparky]

A kid who’s about the age of ten has to navigate life as his grandfather who has dementia/Alzheimer’s gets worse. It ends with him in an auditorium or something and he’s sees his grandfather in the audience.

The cover has a fist holding a stick if I remember correctly.

I read this book around 2018 give or take a year.

[RabbitMilitia]

The Graduation of Jake Moon?

[Sparky]

Yes!