I think it’s crazy to go to a dog friendly beach if you’re scared of dogs, so YANBU.
But I take real exception to the snowflake remark. I always taught my kids to be sensible around dogs - not to try and play with them unless the owner was nearby and said it was OK, but equally not to be frightened of them, as most dogs are friendly, and most owners are sensible.
Then when DS was 6, we were playing football in a park, and a husky came bounding over. It immediately ran straight to DS, knocked him over and started biting him. DS tried to get away, but each time he ran a few steps, the dog knocked him over and bit him again. No owner in sight. Eventually I managed to grab DS and hold him high, while the dog jumped up at my feet, still trying to get to DS. We ran into a cafe, with the dog still jumping and barking at me.
DS had literally hundreds of bites, and required multiple stitches.
Of course DS is terrified of dogs now. When he sees a dog running towards him, it doesn’t take a rocket scientist to know what he’s worrying about. Nothing snowflakey about it.