I'm so sad and discouraged

We lost half of our flock to persistent hawks last fall. We thought we had things secure and the rest of our girls were good since then. Then last week a hen had a prolapsed vent that we couldn't fix and we lost her. Then last night one of our girls didn't make it into the coop before the door closed, we weren't home and a raccoon broke through the run and took her. I'm so sad and I feel so bad for her 😭