Have you actually lifted heavy for any amount of time? If you have you'll know that you need times where you let your tendons and ligaments rest. Your joints will thank you too. Muscles recover much faster than your connecting tissues (and your CNS for that matter).
Look at something like the 5/3/1 workout. It's set up in a manner that you can do it indefinitely because it has built in periodization. For 3 weeks you work up to near maximal weights then a 4th week of deload. This 4th weeks gives everything else (again - connector tissue, CNS) a chance to fully recover.
A complete program is not necessarily complicated. Running is NOT a replacement exercise for a squat and DL variation.
Look at something like the 5/3/1 workout. It's set up in a manner that you can do it indefinitely because it has built in periodization. For 3 weeks you work up to near maximal weights then a 4th week of deload. This 4th weeks gives everything else (again - connector tissue, CNS) a chance to fully recover.
A complete program is not necessarily complicated. Running is NOT a replacement exercise for a squat and DL variation.