Why is congress seen as the most powerful branch of government yet the one where the least gets done?

Congress is viewed as the most powerful in light of the fact that it can make laws and declare war and also they can appeal to indict a President. They however don't much done in light of the fact that both the House and the Senate are comprised of various individuals from contradicting political gatherings, and frequently don't concur on different things. The founding fathers made Congress to be hard to complete something since, they just needed things to happen on the off chance that it was totally vital.