Hilltop was defeated, and the characters were forced to flee and seek refuge elsewhere.

Does hilltop get destroyed?

During the Whisperer War, the Hilltop was forced to be abandoned after the Whisperers shot a volley of fire arrows into the Hilltop's walls, setting the community ablaze and damaging the buildings beyond repair.

Does Alpha destroy Hilltop?

On their way back, Rick and the group discover that Alpha has decapitated 12 residents of Alexandria, the Hilltop, the Kingdom and the Sanctuary, and that she used their heads placed on pikes to mark the border.