It is also lazy, and shows either that you cannot understand the original, or you can't put it into your own words. Literary critics often quote authors extensively, but that's because they are analyzing the actual words. You are analyzing ideas and information. Just put into your own words any information that is useful to your discussion. Suggestions for writing.
Every professional writer does a lot of revising and editing before the final version.
So you should do it too. Go over your first draft and revise and edit thoroughly. If you allow a day or two to pass you will edit the next draft more effectively. Make your sentences read smoothly, clarify your ideas, ensure that your ideas are relevant, and check for poor grammar or spelling. Make sure you meet the specifications of the assignment.