If you don't mind, might I suggest a tweak in tactics: Your first guess told you what the 2nd letter is. For your 2nd and 3rd guesses, you then re-used the same letter in the same position. That means that for your 2nd and 3rd guesses, only 4 of the five letters could give you any new information. I'd have just mentally parked the fact that I now know what the 2nd letter is, and used that slot to try out other letters to help find out what letters are in the word. That way, you maximise your chances of having enough information to know what the answer is by about guess 4 or 5.
Similar issue methinks. After guess 4, you knew all the letters except the first one but there were more possibilities for the first letter than you had guesses left, meaning that just repeatedly guessing the right word would give a high probability of losing. I think in that situation, for guess 5, I'd have picked a word that contained as many as possible of those letters that might be the the letter you want - that way you maximise your chance of finding out what the final letter is, and therefore of not losing the game.