The flaws of Lear, detrimental or no?

In the play King Lear, we identify some major flaws in the characters especially the king himself.
King Lear's tragic flaws include his inability to perceive true love from flattery, and letting his passion override his sense of reasoning. In the first Act, where he is dividing his kingdom between his three daughters, he asks each to tell him how much she loves him. He used this method to decide which daughter got what amount of the kingdom. This was foolish because it gave way to lies being told.

The major flaw of Lear, which is enjoying flattery lead to the banishment of two people who loved him dearly: his youngest daughter, Cordelia(who could not express her love in words so remained silent) and his trusted advisor, Kent(who was defending Coredelia). This left Lear (and the kingdom) vulnerably open to any attack, not outwardly, but inwardly-by his two older daughters, Goneril and Regan who were trying to destroy him. They went as far as kicking him out of their homes in the middle of a raging storm.

Cordelia showed her love rather than stating it; and Kent's action spoke louder than words. Lear's realization hit when he saw the wickedness of one daughter(Goneril) being supported by another (Regan), but he still refused to acknowledge Cordelia's unspoken love, until she came to his rescue. This shows that Lear, eventually learned his mistake when it was almost too late for the kingdom, but entirely too late for Cordelia, for he only came to his senses when agonizing over her dead body.

Such flaws in someone so old illustrates the fact that he is unstable and unwise; in no position to run a country. Leaving both the country and the individual himself in a dangerously vulnerable situation.