BLASPHEMY! RAWR!
Kidding, kidding. Thank you for the ask!
In short: No, because no one is really just anything.
Incel may be part of Furuta’s character, but there’s a lot more, too. He can’t be dismissed and boiled down to just anything.
On the technical side: Furuta’s a misogynist for sure, given his actions towards Eto, Ami, and Rize. But does he fit the definition of incel?
I believe ‘incel’ means a man who blames his involuntary celibacy on women, even claiming that women’s rejection is the cause of their violent behavior. As for Furuta:
A. His celibacy is unknown (though he does date Ami, and he has many fans…).
B. More importantly, when he’s literally dying, Furuta says his violent, appalling actions were caused by his desire to destroy his corrupt family, the Washuus, not because he’s mad women won’t sleep with him.
He’s only angry one woman won’t return his affections him. I honestly don’t know if this makes him an incel or not.
Still, that’s the technicalities of your ask. The spirit of your ask is more ‘Furuta lashes out because he’s mad he didn’t get the girl he wanted and that’s creepy and misogynistic’ and, well, yeah, you right.
Furuta’s behavior towards Rize reeks of jealousy and toxic masculinity. He’s bitter that she doesn’t remember him, even though he claims he sacrificed a lot to free her (given the flashbacks towards the end, I suspect this means his father’s affection?).
He is jealous of her dating others, and he admits he’s terrified that she’ll get pregnant by someone other than him. And then, he turns around and captures her, turning her into another tool to destroy the Washuus.
This is terrible and cruel and, yes, misogynistic.
But misogyny is not his primary motivation: razing the ghoul/human societal dynamic is. Furuta’s dying claim is that, even before Rize, he had decided to destroy everything. He wants to destroy his family, his family who has a literal rape garden, his family who breeds kids who can only live ¼ to 1/3 of a normal lifespan, his ghoul family who convinces humans that ghouls are the enemy, all while they devour the corpses of the humans who die fighting for them.
He does horrific things – child soldiers, extracting Rize’s kakuhou, etc. – to achieve this, in addition to horrific things that don’t move his plan forward, like Ami. I’m not trying to downplay his actions.
But I don’t think misogyny is his primary motivation. Like every person, Furuta is complex, motivated by many things – grief, revenge, hatred, even justice. (One of the brilliant things about TG is that the main, overarching antagonists – Arima, Eto, and Furuta – as well as our main protagonist, Kaneki, all have the exact same goal of ending their cruel society).
With Furuta, I personally admire him for recognizing how wrong everything is and fighting back. He even seems to recognize that his actions are appalling and morally unjustified, given how he trolls Ui over ethics and basically forces the corruption the CCG covered up to the surface, until they have to see themselves as hypocrites.
And, tbh, after a lifetime of abuse from his own misogynistic family, it’s not hard to see why he became a misogynist and chose such a cruel option.
Still, his sins are not excusable – see Kaneki, who was also abused, albeit differently, and yet didn’t blame Rize or willingly hurt others (so long as there were other options, that is).
But, yeah. All that to say, I don’t think Furuta is ‘just’ anything. He’s morally gray, like all the characters in TG.
He’s pitiable.
He’s charismatic.
He’s a brilliant strategist.
He’s depressed and lonely.
He’s brutal.
He’s a liar.
And yes, he’s a misogynist.
I’m sure many readers hate him and I completely understand why. But I also understand why people love him. That’s what happens when you have such a well-written, complex character.
As for me, he’s my favorite character in all literature. 😛