My three things are:
1- players who annoy adversaries with words
2- Players who delay to play purposefully
3- losing a match with AA pair in hand
I'm sorry for my opinion ... You are too emotional about playing poker, which is a very big drawback ... All 3 points that you described are solid emotions ... Try to look at this from another side.
Personally for me 3:
1 - the deterioration of poker ecology due to the division of players into different pools, depending on the country of residence !!!
2 - permanent deterioration of the conditions of the game in poker rooms, including the increase in rake, the deterioration of the structure of tournaments, namely their speed, reduction in the number of shares and additional ways to make a profit
3 - quite long downstreams in 1-10 thousand tournaments, which I took place