Just suffer, suffer, suffer, die, die, die.
Can she get a W for once? Actual peace and happiness without something coming in to ruin it?
Part 2 ended and we're STILL WAITING. It’s been over 10 years IRL (her Servant self does not count because I'm talking about story interactions).
There were so many opportunities for her to shine and the vast majority of them were squandered by the writing.
She could have been the main antagonist of a huge story arc (or the main PROtagonist, or even both). She could have been written seriously and not as pure comic relief. She could have been given some actual Ws and have a chance to show off her true strength.
She could have joined our group (at least her U-version) after one last fight upon completing the U-Medallion and then fused with her soul remnant to battle Maris, but NOPE. There were alternative ways to keep her relevant to the story too, but again, NOPE.
Edit: For those of you who are wondering why I used U-Olga's image when I'm talking about ALL the Olga variants, look for the little image of her Third Ascension (the Director). Trust me. It's there.