What book did I last read?

Goodness. I didn't know it was such a contentious subject.

If you want to finish the series, have at it. I would recommend it. In fact, I would recommend starting over.

I thought the last several books involving Sanderson were well done. You might not. Clearly, many others don't think he did well.

It doesn't really matter. You'll either like the series and how the ending was done or you won't.