The absolute best strategy for most reading comprehension struggles is read aloud. Active discussion is good too.

Or I also like to tell my high schoolers to be contrarian with the text. To argue against it, to try to prove it wrong, even to the point of bad faith. “You’re saying the book sucks - I want receipts. Tell me about it.” I don’t carry an English certification but I will happily pressure high schoolers into reading the books in English class.