Answer:
She dismisses love as a foolish child, but she isn't as delightful a character as As You Like It's Rosalind (who thinks the same thing). Why? Because love makes Helena a fool. It's hard to be sympathetic to her when she's so busy being self-pitying all the time. Within the spectrum of lovers, Helena is the best representative of unrequited love.
Step-by-step explanation:
Obsessed over Demetrius, Helena's character emphasizes the capriciousness of love and its excesses. Even though she knows she is making a fool of herself by pursuing Demetrius, Helena cannot stop the chase. She reminds us that love is blind, declaring that she is as beautiful as Hermia, so there is no logical explanation for Demetrius' sudden shift in affection. This point is further emphasized by the two men's love potion-induced attraction for her. Through these interactions, we learn that love is blind, illogical, seemingly produced by magic's sleight-of-hand, rather than reason's honesty. Like a child, lovers are often beguiled by trivial trinkets rather than deep character traits. This message is further heightened by the blandness of Lysander and Demetrius. As Lysander makes clear in his conversation with Egeus in Act I, no noticeable differences exist between the two men, so Helena could just as easily love one as the other.