Well yeah, but have to put yourself in his shoes.
He's a fat virgin loser, that got bullied in school and was friendzoned by the only female friend he ever had... (I know this must be very difficult for most people here to imagine)
...then suddenly Ella comes along:
A beautiful big-tiddie-goth-girl that saves him from his miserable life being giving him the 2 things he's always wanted (love and power).
Ella must, at least subconciously, be like a goddess for him and he also is deeply indebted to her for what she gave him.
It's basically like MK-Ultra (just without the torture) - Jake is in a brainwashed-like state when it comes to Ella.
I believe he's slowly snapping out of it though, starting to distrust his goddess, and will eventually heal a certain girl together with MC's new powers.
I know more about what he lived through than you might think. Yet the first thought I had was that, even with such a reversal, backstabbing a guy that not only was friendly to you contrary to most other people (if not everyone else), but also stood up for you against someone you deemed untouchable, is fucked up. When you're bullied because you're an easy target at school, you keep your very few friends close.
He choose to consider he didn't need you anymore since he had powers. He choose to ruin your life because he could. Simping or not, Ella doesn't seem interested in his dick in the slightest, so I highly doubt she's making him believe he'll get anything out of her. He choose the easy path because he's a coward. He went from being used by Jared to being used by Ella. He didn't changed his situation, he just traded one bully for another and kicked out the only person protecting him in the process.
I agree he's a very dangerous wildcard, but if MC would kill him there would be no chance to heal a certain girl.
I'd say false. The prison "experiment" scene states clearly that the MC finds out healing others is very easy, as the body tends to try to fix itself on its own, function that ends up fuelled by his power. Jake didn't brainwash her, he wrecked her brain, fried it, caused physical damages. Damages that the MC can heal. That's something Jake could have known if he had bothered to talk with the MC rather than backstabbing for the potentiality that someday maybe Ella would think about considering the idea of helping him. Because when she says she will, even a 4yo would notice she doesn't think a word of it.
Sure, before the prison part, the MC didn't knew how to do that, but he did know for quite a bit that it was a possibility. And the MC is league above Ella when talking about being trustworthy. Especially since she's not "some girl" for him, but his friend as well as Jake's.
Also my money is on the high possibility that, when she wakes up/gets healed, if Jake is still alive, she'll be terrified of him, which is likely going to wreck him and cause him to do something stupid.
And MC killing everyone that could be a danger to him would make him no better than Ella, who some people claim is evil, even though she runs an orphanage for homeless children (without sexually abusing them) and is a good mommy.
Yeah. It's not like Ella's known by now to pretty much never do anything without ulterior motive or anything.
She totally runs that orphenage out of pure compassion and the goodness of her heart...
Seriously she might not be abusing them or outright torturing them, but if you think she's doing it for a purely altruistic purpose, you're fooling yourself. She clearly proved she doesn't value other people's lives.