I am aware that many, many people have issues with TS2 running on modern systems. The Sims 2 Ultimate Collection, on the other hand, is a straightforward download-and-install, and it is attached to Origin.
During the course of TS2, the Sims 2 has gone through many changes. In the beginning, the 2004 version, it's just a simple installation, and there wasn't even a Launcher. You just installed the game through the four discs, played a little game, swapped the discs from time to time and got the whole thing installed eventually.