Bogaerts is one of the league's toughest to strike out. He is in a slump - that will likely pass.
Betts is so not hard to get out he was runner up in MVP last year.
Outside of Bradley, none of the Big 3 are 25 yet. To write epitaphs for them is utterly batty. The team is actually the hardest to strike out (or had been for most of the year - Astros might have passed them, I have not looked) in the league. It's just a rough patch right now.