Another game up 3-1 lose 4-3 after 75' minute

This is a pattern of last years game and now again this year.  It can not be attributed to my skill that every other game I panic after the 75' minute mark.  I am only good at the beginning of the game and then I can no longer play after the 75' minute mark.  It is possible but highly unlikely.  What is more probable and likely is a algorithm.