‎To conclude, the drawbacks of using TV are much more revelant than their advantages. Culture programmes and documentaries have been less and less and even If we get a large amount of information for free, most of them come from garbage programmes, and therefore their quality can only be low, poor and harmful for our education 聼起來自然嗎?

To conclude, the drawbacks of using TV are much more [?-“revelant” is not a word] than their advantages. Culture programmes and documentaries have been less and less. Even if we get a large amount of information for free, most of them come from garbage programmes. Therefore, their quality can only be low, poor, and harmful for our education.

I made new sentences because you had run-on sentences.