@Elleasia I'm not sure how your system is using 68% of installed memory just on startup, but that would be enough to cause Sims 4 to run out of memory, especially once the EA App is added in. The first screenshot only shows Dell OSD (on-screen display) as enabled on startup, and I'd suggest disabling it for now. It can be helpful at times, depending on how you like to make adjustments like screen brightness, but it's using a significant amount of resources, and I've seen other reports of it causing crashes and extremely high memory use.
Still, that doesn't account for the almost 3 GB RAM being used over what Windows needs for itself. I'd suspect other Dell software, and McAfee as well. If you don't have a particular reason to use McAfee, I'd suggest removing it and using Windows Defender instead, which is just as helpful overall and causes fewer problems. If you do like McAfee, you can keep it; I'm just saying that all else being equal, Windows Defender is the better option.
The goal here is to cut memory use down to somewhere in the range of 35-40% on startup. If the above doesn't get you there, please try a clean boot:
https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd
The one service to leave enabled is the EABackgroundService, which the EA App needs in order to run. Disable the rest as described.
When you reboot your computer, check memory use again, and also look through the Task Manager's background processes list to see if anything other than Windows/AMD/Dell software and McAfee are running. There shouldn't be anything else, but it's always helpful to check.
The clean boot isn't a long-term solution, but if it gets memory use down enough, you can start selectively reenabling services to see what does and doesn't make a difference. It may be that one or two services make most of the difference, and you can reenable everything else.
Finally, I'd suggest removing or editing your screenshots because they show your email address.