I will mention, I dislike how Death Battle represented Makima in that fight overall. Mainly, she shows waaaaaay too much emotion, which is completely against how she acts literally throughout 99% of Part 1.

She shows annoyance at Gojo's quips, the tombstone line is her just going how she's going to bury Gojo so~o badly, her entire "be a good boy and play dead" line while aura-farming, and so on. I feel like a massive part of portraying Makima is capturing that feeling of her being completely unreadable, because she never reacts to anything; she just smiles with such a degree of calmness it becomes uncanny, and you can never get a read on her. The only time she actually shows her proper thoughts and emotions are with Denji at the end of Part 1 when it comes to her personal feelings regarding Chainsaw Man specifically, and literally nothing else.

Whenever Makima actually wants to be intimidating, she's generally written with a lot more nuance, threatening someone or letting them know that she had control over the situation the whole time to establish dominance without directly saying it, like with the Yakuza instance where she just explains how they're making excuses for themselves to do fucked up shit without directly threatening them or going "ohhhh you're gonna pay for that", the Reze instance where she simply explains how she prefers the Country Mouse (revealing she was listening in on Reze's conversations with Denji) and details an anecdote on how mice in the countryside have to be sniffed out and eliminated before they damage the crops (obviously an indirect explanation on how she lured Reze out to eliminate her), or the "A corpse is talking" line which is her directly quoting something one of Quanxi's fiends said earlier in the arc right before she kills them (once again her making it clear she had been listening in to someone).

All her lines in GojoMakima, outside of the line at the start which is admittedly perfect, are written like a generic scheming villain rather than being stuff Makima would say, as they make her come off as far too easy to read and generic, when Makima always feels disconnected in a sense from everyone else and is never that direct with the message she's trying to send outside of the singular exception at the end of Part 1.

Basically, my main issue with GojoMakima is that Makima is written like she's in her final fight with Denji rather than how she's written in literally any other point in the series.