It is immensely frustrating that there is so little unlicensed spectrum available vs the massive amounts of spectrum available to militaries and very rich network operators.

Worse is that the unlicenced spectrum that is available is often so heavily encumbered with restrictions in many parts of the world. Wi-Fi HaLow for example, in ETSI regions, is limited to a paltry 14dBm EIRP in no wider than 2MHz channels and an unacceptably punishing duty cycle restriction in most cases that render it barely able to make a TCP connection (some mitigations exist that involve channel hopping on some products but nothing that works for things that require fixed channels, e.g. IBSS or 802.11s).