I’ve never encountered anyone who has judged someone harshly for a divorce, unless they were the cause (infidelity etc.). It’s something to feel bad about, because it is a failure, no way around that. But failure is what makes us stronger and wiser.
First of all, it’s the marriage that’s the failure, not the divorce. Divorce is the solution.
Not to mention, not all marriages that end in divorce are failures people get divorce after being together for decades. It’s possible to have a happy marriage and then years down the line change and decide to move on. It’s not “giving up.”