Long story; but Matthew is know for making weapon ideas. He makes a lot, but usually people point out problems like him spamming them on their walls, asking how they are, asking the same questions every other day, etc.
His ideas are mainly just usually a reskinned idea he had previously, but with a different name, sometimes he uses the exact same image for different ideas. In addition, 90% of the time, his ideas are overpowered or completely broken. Sometimes he copies other people to “compete” with them, even against their will. He even sometimes steal other people’s work and not give credit.
In addition to this, he tends to ignore criticism/feedback from people, usually him trying to change the subject or move to a different conversation. He even recently went far to deleting criticism, closing messages to avoid responding to feedback, and even blocking people on his wiki (me) for criticizing him.
Now this happened throughout a period since 2016, where he managed to spread to different to different communities with the same result; being despised.
P.S. This is a non-aggressive, non-satirical explanation.