Why Is The King So Weak?

The king is undoubtably the most important piece of the game; after all, if your king is about to be captured with no safe escape, the game automatically ends. But why did they make it the most vulnerable piece of all? Only being able to move one square at a time, with no special abilities to zoom efficiently from one end of the board to the other if needed... Even a little pawn has the potential to transform into a serious offender if given the opportunity for promotion! Surely if I were to have invented chess, with the king in mind as one of the pieces, it would not cross my mind to make it the most sheltered piece on the board. Honestly, my first instinct would be to make it the most dynamic, flexible, and powerful piece.

Historically, European monarchs who rose to power would fight alongside their knights, even on front lines. In fact, many kings came into power through their sheer battle/war prowess. But I don't usually see the chess king come out as a strong offender until endgames, when much of the threat has been eliminated. Why do you think they chose to make the chess king piece so weak? And why is his royal counterpart, the queen, chosen as the deadliest offender of the enemy player? I guess the royal couple balances each other out, with the Queen being powerful and the king being indispensable. But still, I personally found it interesting how they decided to make the king the most restricted piece on the board rather that one of the most powerful. Your thoughts?

Well, the game didn't originally evolve in the confines of European culture/history. It at least goes back to ancient India and the king was the Shah and the Queen was the Vizier. The Queen used to be much less powerful: https://en.wikipedia.org/wiki/Queen_(chess)#History

The king is not a weak piece anyway, only if you compare it with the queen. What it is, is very sensitive.

it is not weak I don't end of the game it might be very powerful

Actually I think that if the king was strong it would unbalance the game as it would be harder to check and checkmate. Just my opinion