How to Remedy Weaknesses Gathered from Insights

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How can one remedy the following list of weaknesses gathered from insights efficiently?:

Time management, endgames, openings, middlegame accuracy, tactics with the rook, queen, bishop and pawns, mate in 1, mate in 4+, hanging rooks, too many blunders and mistakes, resigning in Standard due to getting easily angered by a blunder and using the bishop throughout the game?

Also - What can be said if more of your games end in the middlegame as opposed to the endgame and vice versa?

Thanks,
James