Right, his popularity increased in the US election because people did not like the incumbent (Biden / Harris).

Take a look at other world wide elections that happened in 2024.

Like France (parliamentary system so no presidential election); The incumbents lost 33% of their seats [1].

Or UK; The incumbents lost 67% of their seats [2]

And yet, Trump didn't even make it to 50% of US votes. People really did not like him. People really hated incumbents. Your numbers even show this, Biden 1 has more votes than Trump 2; they just didn't support the incumbent anymore.

[1]: https://en.wikipedia.org/wiki/2024_French_legislative_electi...

[2]: https://en.wikipedia.org/wiki/2024_United_Kingdom_general_el...