Yeah, that's part of the learning curve when moving from 5e to PF2. High AC in PF2 isn't about avoiding the hit, but avoiding the crit. If you're in melee you're getting hit lol
NGL I keep reading posts and wanting to try pf2e. But then I read the rules and realise the system is garbage.
I love the only meaningful challenges being within a 2 CR range of the party. No really I do. the restricted pool of creatures to build from is just great.
To each their own, but the ability to pool from any creature level is what makes PF2e so great. A high level party can absolutely obliterate a single goblin, but a small army of goblins will still remain a challenge. And dice rolls are significantly diluted so encounter balance is significantly easier for a DM. Takes me 5-10 minutes to choose the enemies and I know that the encounter difficulty will be as expected. In DnD the dice rolls can change an easy fight into a deadly and a deadly into an easy.