I absolutely hate toilet water splash-back.

I also hate, when I am washing dishes, and a line of water from the counter wets the part of my top that touched it.

I also hate stepping on some water while wearing socks.

Seems like you are annoyed by water in general...lol

I hate it when my car seating position gets changed after taking it to a car wash. Trial and error to get it back to the right position. Sometimes have to adjust it while driving, which is dangerous.
I need to get me a car with electric seats, or at least start washing my car myself.

When you motion for someone to go before you and they take so long to move that you might as well saved yourself waiting and gone ahead...

XoXo

Having my car seat adjusted

When someone shouts Ziske! and I say yes? To get total silence and having to repeat yes? Until someone answers

Try talking to the person at the parking exit booms or paystations when your tickets starts acting up!
ring...Ring....RING.
They: Hello
You: Hello....I'm
They: Hello
You: Hello....I AM.....
They: Hello
You: Fuck this ticket....
They: Hello can I help you.
You: AH FINALLY!

Everytime I take a call on my cell, someone else chooses to call me at that exact time, and it is always clients who just keep talking and talking while another client is calling and calling and then asks why you ignoring her calls when you do get back to her.....

When you're standing in a 15 min queue to order fast food and the people infront of you get to the counter and still haven't made up their mind on what to order. Smh

Stationary car parked with hazards on in a busy lane causing a massive pile up. The driver sitting inside the car with the utmost composure. Worse is when there is nobody in the car.

I once remonstrated with the guy and he responded:
"But I have my hazards on!"

A very inferior person with no manners.

Some very funny ones that have been mentioned here, that I can relate to.

Water splash back in the toilet - I put a lot of toilet paper to cover it, so it doesn't happen. (I spend a fortune on toilet paper.)

Car seat adjustment - I found a way around that, I mark the exact spot with a cokie pen.

Letting someone go before you in the traffic - and they don't acknowledge it with a "thank you." Makes me very angry.

Letting somebody go before you, and they immediately decide to pay it forward and allow somebody else infront of them.