LuziferDraws Have you tried uninstalling and reinstalling .NET Framework 3.5? I realize it's enabled now, but that's not the same as forcing Windows to remove and redownload it. And the more recent Sims 3 errors in your dxdiag look like a .NET problem. Click the filled-in box to uninstall, restart your computer, click the now-empty box to reinstall, and restart again.
If you get an error when trying to reinstall .NET 3.5, please post a screenshot.
Part of the point of repairing was to undo the Alder Lake patch, which is unnecessary with any EA App install now and would also not be necessary on your computer in any case. I also wanted to know whether you'd made any changes to the program files that might prevent the launcher from working. It's fine to reapply the workaround to bypass the launcher, but please don't do that for now since the whole point of this is to try to get the launcher to work again.