ManicPot8to A memory leak wouldn't cause a BlueScreen, and game crashes are an entirely different matter. Those can definitely be Sims 4's fault, but when you're getting BSODs, that's the first and most important problem to address.
What world(s) and lot(s) are you using, and does the game run better in a base game world? I'm not saying you can't use the rest of your content, only that this is a useful test. Please try with fresh sims and a blank or default EA-made lot, nothing from the Gallery or your own library.
There have been a few different known bugs that cause blatant excessive memory use, not necessarily a "leak" in the strictest sense, and thse have been patched rather quickly. That's not to say that there isn't a more subtle issue right now, only that it's not a persistent ongoing single issue so much as a somewhat common symptom with various and often unrelated causes.