When it comes to describing something as being more third-rate, there are several synonyms to consider. Some alternate words that come to mind include subpar, mediocre, inadequate, unsatisfactory, inferior, inadequate, and second-rate. Each of these words paints a picture of something that is less than desirable or below average in terms of quality. Whether it's a product, service, or experience, using synonyms like these can help you describe just how disappointing something truly is. So, the next time you're struggling to find the right words to express your disappointment, consider using one of these synonyms for "more third-rate".