ثَنَى إِلَيْهَا انْصِبَابَهُ
He diverted the full current of his inclination toward it.
Thanā suggests turning or directing, while inṣibāb evokes an outpouring or concentrated inclination. The line pictures a heart flowing almost entirely toward one object.
The criticism is not of the existence of material goods. It concerns an attachment so dominant that other aims are eclipsed.