I short; yes, you picked the wrong CPU. But more on a cost factor than performance.
No games or sims will be able to fully utilize that beast of a CPU. It’s more optimized for stuff like tile based renderers, where all tasks running on the different cores don’t need to be kept in sync.
The thing that might hold it back a bit is that the cores are on separate CCX’s. Communication between the CCX’s will cause some latency.
It shouldn’t be too big of a hit though, certainly not enough to have a large performance deficit.
It’s a great CPU, just not really designed for the sort of workload you’re throwing it. It’s overkill. So maybe a bit of a waste of money, but shouldn’t do noticeably worse than say a 3600 or 3800.
Edit: to add to this; if you’re only running on 1440P, you’re basically not utilizing that 3090. It’s meant to be used at 4K. You’re most likely only seeing it run at 50%? Complete overkill for 1440P.