You can have your little strawmen armies fighting each other all you want, but ultimately you do not control or dictate what people like or do not like. That's it. It' a shame people have to get vile to the point of dehumanizing behaviour but at the end of the day I like what I like and don't like what I don't like.
Yes, some people take it too far and some people are hypocrites. Your point? You list extremes as if that's a valid counter argument to people disliking UB.
People debasing themselves out of rank entitlement seems more the norm these days than the exception. I can think of a fair few things that would be considered 'additive' in today's social / political environment that average citizens are becoming increasingly violent over. Suffice it to say, extreme behavior might be a lot more common than you think.
These are great points. Some people, whether talking about MtG, video games, or anything else, for that matter; get upset when something exists or incurs that they don't want. Whether or not it directly affects them, they are vocally outraged. When the Nintendo Switch came out I remember participating in a thread on Reddit where people were discussing their desire for Nintendo to finally get on board with achievements, and add them to the ecosystem—completely additive. There were suggestions to be able to hide/disable them if you don't want them, even. Some players were absolutely ENRAGED by the prospect—for reasons I am still unable to truly discern—and the thread devolved into some of the most egregious, volatile comments I've ever witnessed on Reddit. People that adamantly have a deep hatred of achievement, for whatever reason, were doxxing other people. There were death threats, constant ad hoc attacks, and the thread was ultimately locked and deleted after people wouldn't stop. Some users were banned. It was insane. For something that would have absolutely zero effect on them if they chose to ignore them. The same thing happens, here, too. A lot of people that want control over what their playgroups play, often have a playgroup with friends with similar desires. For instance, if you don't want EDH decks to have a power level higher than 5 or 6, you probably only play with people that also play that way. Even if someone in the same LGS is playing Negan, if you don't like it you don't have to play against that deck. If your playgroup is fine with them playing a Negan deck, but you aren't, perhaps the issue is yours and not the person having fun with Negan. As has been pointed out numerous times, with their solution of printing in-universe versions of UB cards, there shouldn't be a problem what-so-ever, for people that want to play with cards with a different coat of paint. If someone doesn't like UB cards on principle, I'd be disturbed if they have waifu, Sonic the Hedgehog, or DBZ alters. It's hypocritical. I have seen a person at an LGS complain about someone's Aliens vs. Predator alters, as being too sci-fi, while they themselves had naked elves painted all over their own cards.
It is a sad fact of the human condition - if not the saddest - that so many people are inclined towards forming their personal identity around what others are not allowed to say, do, or think.
I'll say this, it's stupid to say you wouldn't play with someone with those cards, just like it's stupid to say you don't like people that don't like UB. It's no different than saying "I won't play against turn 1 infinite combo" or a specific format and you wouldn't judge them for not playing a format, would you?
It is different. One is mechanics and power level, the other is art and card name. Apples and oranges.
Never watched Stranger Things, don't intend to any time soon, so I couldn't care about this outside of the eye rolling nature of UB, Secret Lairs, and both put together. I will say this, that art of that boy/girl/thing looks like it should be on a Goosebumps cover and not on a Magic card.
Her name is Eleven, she's played by Millie Bobbie Brown, the art is ripped straight from the show, and I'm fairly confident she prefers traditionally female pronouns (she/her).