Swamped

Seven is considered a "best" or "perfect" number. Some of this meaning can be read into the most common depiction of the card, where there are two lines of three of the symbol, one on the left and one on the right, and above and between them both, a singular symbol. If either side could lay claim to the final symbol, they would become an ideal set of four, but it lies out of reach, leaving both contentious sets of three.