I assume that you don't know that envy is synonymous to jealousy, do you?
I have an English Literature (Hons) degree.
First link on Google: https://www.diffen.com/difference/Envy_vs_Jealousy
I could also send you a Simpsons link, as it's permeated pop culture to be referenced.
This is getting off-topic, though.
tl;dr The only person that can demote an admin is a bureaucrat or staff member, and the only person that can demote a beauracrat is the beauracrat themselves or a staff member. The beaurcrat in question seems to have broken no ToU and had a fair point, so staff likely would not demote them. It's better you just drop it and move on, for your own peace of mind.
I don't care about that link. Google already had it that envy is synonymous to jealousy. You know what synonyms are, don't you? The admin and wiki manager of Disney Wikia was the one who taught me about synonyms, her name was SilverFlight. Synonyms are allowed in Disney Wikia in order to provide concise information. If you think that envy is not synonymous to jealousy, then lodge a complain about Google.
Look, you can debate semantics all you want, but the bureuacrat said "no". That's it. There's no debate, no discussion . . . he gave you a rule, and so you follow the rule or you don't use that wikia. If you keep arguing with him and breaking his rules, he may follow with blocking you. It's best to walk away.
You should know that every Wikia have more than one admin and bureaucrat. SilverFlight is another admin, bureaucrat and wiki manager. Hey1234 is not the only admin calling the shots in Disney Wikia. I repeat, "not the only admin". He made a rule of "screenshots as infobox profile images" without even consulting with us. Not even voting. Probably because of this, SilverFlight distanced herself from Disney Wikia. For she still support promotional images as infobox profile images. Hey1234 did not even show evidence why screenshots are better. And your saying of "his" rules, what? The Disney Wikia belongs to everyone, not "his". And, in Disney Wikia, we preferred synonyms over adjectives. I ask you this: Do you know what synonyms are?
"we preferred synonyms over adjectives"
If you think the two are mutually exclusive, you don't know what synonyms are. Or adjectives. Or both.
If you dislike the rule he created, speak to another bureaucrat.
If you dislike their ruling, create a blog post or Discuss post and engage the community.
If the community agrees, make a poll and try to get the rule changed.
Oh, most people know what they are. But whether you like it or not, there is a slight difference between the words. And looking at the comment thread on the Disney Wiki, you changed wording unnecessarily. Is this a hill you're really willing to die on?
Word of advice though? Work on that attitude problem.