First, Laertes digs in. In Act I, he tells her:
Fear it, Ophelia, fear it, my dear sister,
And keep you in the rear of your affection,
Out of the shot and danger of desire.
Laertes is full of double-standards and Oedipal jealousy. He says that Princes like Hamlet are spoiled and that "The chariest maid is prodigal enough If she unmask her beauty to the moon. Virtue itself 'scapes not calumnious strokes."
Next, her father forbids her to see Hamlet. He condescendingly treats her like a "baby":
Marry, I'll teach you. Think yourself a baby,
That you have ta'en these tenders for true pay,
Which are not sterling. Tender yourself more dearly,
Or—not to crack the wind of the poor phrase,
Running it thus—you'll tender me a fool.
So, Ophelia is punished for being a woman and forbidden to see the man she loves.
Finally, Hamlet appears to Ophelia all disheveled in the "silent interview." Ophelia says:
He took me by the wrist and held me hard;
Then goes he to the length of all his arm;
And, with his other hand thus o'er his brow,
He falls to such perusal of my face
As he would draw it. Long stay'd he so;
At last, a little shaking of mine arm
And thrice his head thus waving up and down,
He raised a sigh so piteous and profound
As it did seem to shatter all his bulk
And end his being: that done, he lets me go:
And, with his head over his shoulder turn'd,
He seem'd to find his way without his eyes;
For out o' doors he went without their helps,
And, to the last, bended their light on me.
This is Hamlet's "dress rehearsal" as "crazy Hamlet," and it troubles Ophelia, especially when he tells her to "doubt" that the stars are fire. Hamlet knows the falseness of Denmark and his mother's marriage, and he uses Ophelia as his "whipping boy," punishing…