You can deal with it in many ways. First, you need to ask yourself a few question. Why did the thought occur to you? Where you having a shitty weak, did you

You can deal with it in many ways. First, you need to ask yourself a few question. Why did the thought occur to you? Where you having a shitty weak, did you have a bad day or is the product genuinely bad? When you answer this your next steps should be talking to someone higher up to voice your concerns assuming there is something wrong with the product. If it is not the product then take some time off as you sound stressed. Don't do any ounce of office work just do something fun.