For the cooler, you can get nearly equal cooling from a ThermalRight Peerless Assassin or Phantom Spirit (Evo) and save like $130. You could also get a good AIO like the Arctic Liquid Freezer III for less if you’re okay with water cooling. Even the newer D15 G2 is cheaper if you’re okay with it in classic Noctua colors instead of all black.
I don’t know that you’ll need any extra fans with the Torrent case, but for best value go with Arctic P12/P14. I think the Phanteks D30 will get you a bit better cooling and acoustic performance, but at a premium. HardwareCanucks and other youtube channels should have a good run down on your options there.
It might sound silly, but did you make sure the PSU power switch is turned on? Have you tried jumping the front panel pins on the mobo instead of using the power button? Made sure cables are securely plugged in on the PSU as well as the mobo? Tried plugging it back in to the original outlet that it worked at before?