. I set out to change it and thenjoint joined debate team.
During the first stimulations
During first practice sessionsbut I stayed with it.
but I didn't give upI was shocked that my silence in all classes has been completely destructed
.... I feel this sentence does not deliver your idea very clearly. Your idea sounds vague and unclear to me. Also I suggest "disturbed" in place of "destructed"
When felt disappointed with the current university and even frustrated
Being disappointed and even frustrated with the current university, ...Overall, with your essay, I see you have a problem with its flow...