There is a clear noun-phrase disagreement in this section of your essay : "... major breakthrough during the 20th century." Since there wasn't just one breakthrough during that century, you should be presenting that word in its plural form; "breakthroughs". You also do not need a comma between "only" and "but" because that is a continuing statement rather than new idea for the continuing sentence. These are the major GRA problems that exist in your essay that could have an adverse effect on your bracket score.  
  
The main reason that your essay will automatically fail though is because you are not discussing anything in relation to the given prompt requirements. Let me outline the errors that led to the automatic failing score for this essay.  
  
*Prompt Topic: Some people say that TV advertisements have benefits, while others believe the opposite.  
Your Topic: The introduction of television was one of the major breakthrough during the 20th century.*  
  
Based on the prompt topic comparison alone you can see that you have deviated from the discussion topic. Showing that you do not have the ability to understand any English discussions. The original topic was about advertisements, your topic was about the invention of television. The two topics shall never meet. Your discussion topic is non-existent as far as the examiner is concerned.  
  
*Discussion Instructions: Discuss both views, give your own opinion and include examples from your experience.  
Your Instruction: Non-existent. You do not properly paraphrase the discussion instruction at all.*  
  
Based on these mistakes alone, disregarding your GRA problems, your TA score would automatically be a 1. Your answer is completely unrelated to the task. With such a score, you will never pass the test. All because your English comprehension skills are extremely poor thus preventing you from properly understanding and discussing the essay in the manner required.  
  
The proper discussion approach to this essay is really very simple. You just need to provide a 5 paragraph essay that sticks to the requirements every time. Let me show you a sample of how to approach this essay in a manner that will, at the very least, get you as close to a 7.5-8 as possible.  
  
*These days, people are considering whether TV advertisements have positive effects or if it delivers negative feedback instead. There are several public opinions to consider for each side, but for this essay, only one aspect of each public discussion will be considered. These will be the basis of my personal opinion aside from additional information coming from my own experiences and explanations.  
  
The positive occurrences coming from televised advertisements are believed to come from the influence it provides. The people who see an advertisement as a good influence base their opinion on...  
  
Others though believe that there are negative aspects to be seen from such media influenced based sales promotions because...  
  
My personal insight is that... I base this opinion on my experience with...  
  
Finally, we can deduce that...*  
  
These are the only requirements you have to present when discussing such a prompt. It does not have to be turned into an overdrawn discussion as you have done above. All you need are the basics; 5 paragraphs composed of 5 sentences each. For this essay the format is:  
  
Par. 1 Paraphrase  
Par. 2 POV 1  
Par. 3 POV 2  
Par. 4 Personal Opinion  
Par. 5 Concluding summary  
  
There is always a preset format for each discussion type. Familiarize yourself with the discussion types and methods of discussion and work on improving your work from there. There are ample samples to be found here. Just click on the Similar Discussion [+] link to get started.