The more reeds you test as a clarinet player, the greater the odds are that you'll play one you don't like. Before throwing the entire box out, try the other ones in there, and you might like the other ones. If that doesn't work, you can look for reeds from the same brand but in a different strength. With Vandoren, you might also try a different line, such as the V.12. Finally, you might need to try another reed brand.