system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What did Stan Lee do to Steve Ditko and Jack Kirby that people are still so upset about?

I have long regarded Stan Lee as one of my personal heroes. I know I would not be who I am if not for Stan Lee. That is why it always comes as a bullet to the heart every time people vaguely try to discredit him for the things he supposedly did to Steve Ditko and Jack Kirby. Some people truly hate him, but they never say why beyond the ambiguous "he screwed over Jack Kirby and Steve Ditko." Somebody actually called him an evil man and concluded it with a bolded "FUCK STAN LEE."

What, exactly, did he do? What is the bad thing or things Stan Lee did as a young man in the earliest days of Marvel Comics?

But please, if you are unreasonably biased or harsh, you need not answer this question because I will be sensitive and I really only want to hear it from a rather unaffiliated or indifferent source.
gpt
Three reasons come to mind: 

-Number one, Stan Lee has always been the mascot / main cheerleader for Marvel Comics.  He took Marvel's side when the major push started for creators' rights and returning artwork.   A lot of people hate him because they consider him a company man who helped screw over the artists.

-Number two, Stan Lee wrote comics using the "Marvel Method," i.e. he'd provide a rough plot, the artist would draw the story, and then Stan would fill in the typical corny dialogue.  Depending on who you believe, he even used the Marvel Method to create many of Marvel's most famous characters.  In most cases, the artists claim they created the look, the origin, and nearly everything about the characters - yet Stan was given sole credit for decades.

-Number three, Stan Lee became very rich from working at Marvel, while most of the artists ended up broke.  That makes a lot of people hate him too.