Simplify the following text for a Grade 12 native English-speaking person.
Original: He wished to stop `` that barbarous ( mean ) treatment of animals , the very sight of which renders ( makes ) the streets of our metropolis so distressing ( terrible ) to every feeling mind '' .
Simplified: His aim was to correct `` that barbarous treatment of animals , the very sight of which renders the streets of our metropolis so distressing to every feeling mind '' .