The point that SigmaSuccour made about the game being modded is one point where it of course is not good for him to be using that; however, I am curious as to the circumstances as I have seen that there is a plugin for taking screenshots.
Now if this feature is an official plugin, it is important to note whether these characters can be used. Another note is that SigmaSuccour doesn't monetise his games and people can choose to donate to him which also could impact how that works.
If he is proven to be doing wrong in these departments, then yes he should amend these areas; however, if people are just attacking him and not discussing these matters with him, then how can people know the circumstances properly?