Why Single Stage to Orbit rockets SUCK. The wacky history and future maybes of SSTOs

Rockets are HUGE, complicated and expensive. As a matter of fact, the rocket that took humans to the moon, the Saturn 5, was 111 meters or 363 feet tall, and had more separation events than dating teenagers. So why do rockets always split themselves into multiple parts. Isnt that complicated and risky Why throw so much away I mean, theres got to be a better way Well how about if rockets were only ONE stage How awesome would that be Well this idea isnt new its called single stage to orbit or S