I worked with another developer who argued with every choice the rest of the team made, wrote overly complicated code, and was so stubborn we ended up arguing every day for 2 weeks over his poor decisions. I nearly quit twice, and nearly beat him to death with his own keyboard multiple times.

(I am an entry-inter-intermediate level dev)
P = Person

P:Hey Can you build me a POS system for free?

Me: Yea whatever. (because... immediate family member)

P:Ok Great.

Me: *starts working on it.. almost done with inventory control and layouts in one night*

P: When will it be done? and I need it in a full screen window not a browser!!

Me: Soon..and I have not worked in ASP yet. So it will be a full screen browser app.

P: Aww you cant do it fast? You are not skilled enough??? Poor you, you are not good enough. I can do it in a few hours. Just write a C program which stores entries in a txt file. I dont want sql shes-que-el on my system. You dont want to use .txt because it will be harder for you. Poor you.. no skill.

Me: *raging to a level where i turn into kryptonium and burn superman to death but still keeping my calm* You will get it when you get it. Period

Inner Me: GO FUCK YOURSELF. IM DOING THIS FOR FREE SO THAT IT HELPS YOU OUT. NAGGING ME WONT HELP YOUR CAUSE ONE BIT. GO FUCKING LEARN HOW TO CODE YOURSELF AND MAKE IT YOURSELF OR BUY IT FOR A FUCK TON OF UNJUSTIFIED MONEY. IM GIVING YOU A BEAUTIFUL LAYOUT, GREAT APPLICATION ARCHITECTURE USING LARAVEL AND GREAT DATABASE DESIGN WHICH WOULD BE SCALABLE AND PRODUCE MEANINGFUL REPORTS. WHY THE FUCK WOULD YOU PREFER A .TXT FILE OVER A WELL DESIGNED DATABASE. WOULD YOU FUCKING OPEN THAT HAMSTER CAGE OF A BRAIN OF YOURS WITH A KNIFE OR A SCREWDRIVER?
IF ITS THAT EASY FOR YOU GO FUCKING DO IT YOURSELF AND STOP BOTHERING ME. I AM TAKING MY TIME OUT FROM FREELANCING TO HELP YOU OUT. I COULD BE SPENDING THIS TIME ON OTHER PROJECTS WHICH WOULD GET ME SOMEWHERE. THE ONLY FUCKING REASON IM DOING IT BECAUSE I MIGHT BE ABLE TO RESELL THE POS (PIECE OF SHIT) TO OTHER PEOPLE IN FUTURE AND MAKE MY SHARE OF UNJUSTIFIED SHIT TON OF MONEY.

Has your character and level of patience changed since the beginning of your dev career?

I have a feeling that stress mixed with a constant exposure to shitty code, hacky web stuff and abysmal stylesheets have been eroding my immense pillars of patience.
10 years ago I was able to try stuff out for hours with full motivation. I've started a habit of low level swearing recently and sometimes gain a strong urge to punch through a monitor.
I don't have it every day, but it seems worrying...

... or maybe it's just all due to having to HACK the shit out of everything to support fucking IE11.
This complete fuckery of a browser is still in use by about 0.5%... absolute braindamaged imbeciles if you ask me!