RTX4070 Running Helldivers worse than my PS5. Why?

https://reddit.com/link/1hysd53/video/20wihaao2cce1/player

It starts getting stuttery/lurchy like this a few minutes after starting it up and continues doing it no matter what graphics settings I change.

It looks like time is speeding up and slowing down. You can also see it in [this clip on youtube](https://youtu.be/wJeWsV\_Iiws?si=FeBtJ2A4JIFWcE\_x&t=1139).

Specs:

Laptop: Legion Slim 5 16AHP9 - Type 83DH

Processor: AMD Ryzen 7 8845HS Processor (3.80 GHz up to 5.10 GHz)

Graphics Card: NVIDIA GeForce RTX 4070 Laptop GPU 8GB GDDR6

Memory: 16 GB DDR5-5600MHz (SODIMM)

Storage: 1 TB SSD M.2 2280 PCIe Gen4 TLC

I had assumed this was normal for a gaming laptop since I got it back in April (former console gamer). A few weeks ago my brother (PC gamer) saw it and said that is not normal.

Any ideas why this is happening?