Sims 4 lag (2021)

@Daalia1  I apologize for the late reply.  I meant to get to your log yesterday but ran out of time.

Anyway, there's one obvious issue in the log: your processor is overheating to a significant degree.  Here's a graph of the CPU temperatures:

The CPU package temperature (there are several readings that correspond to slightly different locations) hits 99℃ at exactly the same time as the above peak, the package thermal throttles, and from then on, the processor's clock speed drops down to idle:

The integrated graphics chips temp peaks at 98℃ and it downclocks in exactly the same way:

I can't tell you whether the lag is due primarily to the CPU or GPU's low speeds, or both, as in, I don't know which happens to be the limiting factor in this scenario.  But it doesn't really matter—the problem is the internal temperatures, and there's a good chance that getting temps under control will fix the lag issue.

This is not at all critical, but I do also want to mention that about eight minutes in, your computer is using almost all its physical memory (RAM)  before the load decreases.  The system can certainly use virtual memory to compensate, but it shouldn't have to if all you're running are Sims 4 and Origin.  When the log starts, in fact, almost 4 GB RAM is already in use.  So you may have some background programs that should be closed, or some bloatware that needs to be disabled.  You can save that for later though; the temperatures are the much more obvious problem.