Building PCs by hand nowadays is quite trivial. You don't need to set bunch of jumpers on the motherboard correctly, manually assign IRQs, etc. The peak "complexity" modern gamers deal with is correctly overclocking their gear without frying it or making the system unstable (which is mostly done in some nice GUI according to a youtube tutorial anyway).
Building PCs by hand nowadays is quite trivial. You don't need to set bunch of jumpers on the motherboard correctly, manually assign IRQs, etc. The peak "complexity" modern gamers deal with is correctly overclocking their gear without frying it or making the system unstable (which is mostly done in some nice GUI according to a youtube tutorial anyway).