2) and 3) don't make sense
Playstation got exclusives, but Playstation and Xbox hardware are basically the same. Nintendo don't have exclusives and sometimes release whack hardware (Wii U)
Playstation is also the one who invested more in their own first party, even when it had exclusives. Nintendo invest strongly in their own IPs even when they indeed had almost all exclusives (NES, SNES)
Releasing good hardware and investing on their own IPs don't seem to correlate with having (a lack of) third party exclusives







