To bush: (v.) To blunder blithely into obviously disastrous circumstances against all advice, as in "he totally
bushed the whole thing - he walked into that nightmare with a huge happy smile on his face and actually seemed surprised when it blew up, even though we all
told him it would."
Alternatively, to construct a dreamlike version of the world (a
bushtopia) in which one's vision is compromised (
bushopia) and sees blunders as successes, disasters as promising developments, and missions as accomplished before they've really begun. To live in such a dreamworld.