Sims 4 Won't Launch At All.

I managed to fix my issue and wanted to share for anybody who is facing this problem too!!

Last time I successfully launched The Sims 4 i had thousands of mods, script mods, CC and so on and then deleted the game and my mods at the same time when Uninstalling on that occasion. However EA apparently doesn't delete save files like other apps do...So my save files had been corrupted and remained on my Hard Drive trying to be launched so i could, in theory, 'continue' them...which was the exact cause of the issue. Deleting the entire contents of that whole sims 4 folder [Documents -> Electronic Arts -> The Sims 4] then launching the game fixed it all!! So if you've scoured the internet and found that 100% of the 'Solutions you can find don't work, then I'd give this a go! Especially because it doesn't require a re-download; the folder will auto populate when the game launches with no wait time at all!