Note: No names are mentioned in this post, but all characters are real and tend to be very very irritating.
Perfection is impossible in the world, incompetence is common, arrogance abundant!
Behaviours that have been triggering me for the last decade...
Lack of ownership, responsibility and gratitude - People want things done for them, but cannot be bothered to do even a teeny bit for others. Everything they get is their prerogative, and the meagre bit that they do for others is a generous favour. Even if they do something upon your (repeat) request will be done halfheartedly and it shows in the poor quality of work, until you finally shrug and I say "Never mind, I'll just do it myself. Why did I even tell you!" What's worse is some people applaud them for doing nothing, and they scarcely even realise what they're doing wrong or not doing at all! Expect and demand from others, not return anything in cash or kind, and no gratitude as well - that's the cherry on top! Get them Sarahah accounts now, will you...
Misplaced priorities - How the hell can anyone not have basic sense about what matters in life? Work seems to be more important than family, and even in family, spouses get ignored due to the inconsiderate requirements of parents or vice versa. Some folks I know tend to compartmentalise - I've been told "weekdays are only for office and colleagues, I will spend weekends with my wife and kids" - check the cheek! How about only breathing all week and then only eating over the weekends? Life is all about balance. And then they expect you to be okay with their choices and their decisions, in which obviously you have no say coz that's an encroachment on their privacy and freedom. Duh! Like, really?! I never believed in personal space, though I do value it's significance. However, when you carve out personal space time from the 10% time you give someone, then that's pushing it too far. Time and tide, and most importantly people, do not wait for anyone. If you let someone be alone too long, they will walk off sooner or later - either to someone that values them more, or they will find themselves so complete that they do not need anyone at all, not even you. And that can pinch. A little effort goes a long way.
Possessiveness and insecurity - About relationships, understandable. About work? Why? It's not like someone can take your knowledge and expertise away from you! Even if you share everything you got, people will only be able to take as much as they comprehend, and that is where your exclusivity lies. And if they make it better, then that's something for you to learn! Insecurity and secrecy, especially at the workplace can do more harm than good, for your career and reputation. Besides, teaching once is learning twice (which is exactly what I do as a trainer and coach).
That there can be many behaviors more upsetting than the above is probable. Having said that, the only person we can change is ourself and the only thing we can change is our response to circumstances.