in a more serious note ; Evil Morty lost his eye due to his original Rick who was horrifically abusive and neglectful to Moe. This would be back where evil Morty was more of a emotional creature, more Morty than he is currently.
Something ends up happening to Moe's rick which then leads Evil morty to be put into the Morty adoption agency, which then he's basically loaned out to every shitty Rick who is unable to keep their morties alive, or doesn't care about the wellbeing OF their morties, which then in turn is why Moe is so engraved in this idea that all Ricks are demented and evil and inherently corrupted because he's experienced nothing but bad Ricks again and again. It's why he doesn't believe C137 is different, he's seen how Rick treats morty, all of them, but it also explains why after this most recent episode he finally takes a step back to recognize that ' you are different than the others, maybe I can use that' .
Morty as we see in canon ends up basically having enough, I wouldn't be surprised if being passed around so much enforced an idea in trying to be MORE than a Morty, and being so used to being alone and isolated and mistreated that he enforced and attempted to become smarter than those who continued to harm him.
I will die on the Hill that Evil morty is genuinely smarter than Rick, Morty prime is the mortiest Morty, But Evil morty is the Rickest Morty and for that he's labeled Evil. If you cut off the thing that makes morties MORTY , the compassion, the bred forgiveness and kindness - the willingness and devotion to forgive, you end up with Evil Morty who has basically lost all those qualities that make him what would be a morty. And I'm not saying EM doesn't have those anymore, he just knows how to ignore the basically programmed roots and ideations of how morties should be. For he's not even a morty in his own eyes. He's something bigger.
He wants Rick to die, but he doesn't want to explicitly be the one to pull the trigger unless provoked. Evil morty is keeping everyone at arm's length with a gun pointed at their heads ( the omega device ) but doesn't want to use it because all he craves and desires is to be left alone.
People claim evil morty went through the exact same as any other morty, but what we see is the tipping point, we don't see the constant or WHAT Morty goes through, we just see what's the last straw, which debatably is enough to see EM wasn't treated fairly. Especially when he falls to the ground and flinches , arms over his head to protect him from what he expects as physical retaliation. For evil morty that is a sign that he hasn't just gone through mental abuse , but physical as well.