I would add that "electoral maths" is something some medias spend way too much time obsessing about. It goes "meta" on the voting intentions, ultimately encouraging tribalism by eclipsing the actual propositions. Furthermore it’s all based on polls which are increasingly unreliable since the end of the landline era.
Really liked this articulation that someone shared with me recently:
here's something you need to know about polls and the media: we pay for polls so we can can write stories about polls. We're paying for a drumbeat to dance to. This isn't to say polls are unscientific, or false, or misleading: they're generally accurate, even if the content written around marginal noise tends to misrepresent them. It's to remind you that when you're reading about polls, you're watching us hula hoop the ourobouros. Keep an eye out for poll guys boasting about their influence as much as their accuracy. That's when you'll know the rot has reached the root, not that there's anything you can do about it.