Kingdom Death: Monster is best understood as nightmare world XCOM where your soldiers constantly die, but you get to keep all their gear. The game is intended as a hobby unto itself. A “full game” of KD:M involves playing at least 30 multi-hour sessions, barring total failure. You frequently have a 10% chance of having your best character die during random events. Death is in the name, so know that going in.
Do not let the minis seduce you. Don’t buy the game unless you want to invest the time. It is cool, but is not for everyone on many levels.