Possibly, but more likely the computer was just in need of some cleaning.

My friend plays Helldivers 2 on his laptop with integrated graphics on medium and hits 30fps. Any CPU from the last 8 years should be enough.

For the finals, yeah maybe you need something more powerful than that, but not by much. A 2070 is a fantastic GPU, it would be pretty weird to have a GPU from 2018 but a CPU from way earlier.