What criticism has Stan Lee gotten over the years?

Stan Lee is a famous cartoon artist who worked as a creative force at Marvel Comics in the 1960s and 1970s, then moved on to be a publisher. During his time at Marvel, he worked to create several of the most iconic cartoon figures of all time--The X-Men, Iron Man, Thor, Spider Man, The Avengers, and The Incredible Hulk, among others. Many credit him with creating pop-culture legends that have only grown in popularity over time. He made his heroes remarkably human, as opposed to archetypes of perfection as earlier superheroes had been, and he also introduced a colloquial way of speaking that also helped his audiences relate to his characters. He also created a shared fictional universe of comic characters and created the Black Panther, the first major black hero in comics. 
However, despite his role in creating pop-culture phenomena, according to some sources (see the link in Vulture below), there are doubts that he almost singlehandedly created these characters, as he and Marvel have claimed. There is a consensus among some scholars that he and Marvel downplayed the work of collaborators who helped to create the comic book characters Lee claims as almost his own. For example, in an article in Inc. (see the link below) published on November 1, 2009, he said "All the characters at Marvel were my ideas." He is now chairman emeritus of Marvel and has moved on to his own company, POW! 
https://www.inc.com/magazine/20091101/how-i-did-it-stan-lee-of-marvel-comics.html

https://www.vulture.com/2016/02/stan-lees-universe-c-v-r.html