“I don't want to think about this problem (or the future) because it's too depressing/demoralising/overwhelming/frightening.” All change is for the worse, regardless of options implemented. Lack of confidence in ability to fix problem. Pessimism. 'climate fatalism'.
Maybe an effective solution could be identified but won't be implemented ('non-solution'); eg, due to higher priorities, differences of opinion, values, etc. cf. no-good-options qv, insignificance qv, priorities.
Distinction with no-good-options: no-good-options refers to action side-effects, whereas demoralising is that the problem (goal) itself may be unsolvable regardless of options implemented. Demoralising results in not even thinking about the problem and not attempting to take action to address it.
Distinction with insignificance qv: insignificance emphasises the need for collaboration; demoralising emphasises that there may be no adequate solution at all (even with collaboration).
Demoralising (and insignificance qv and no-good-options qv) leads to fatalism such that the individual takes no action (believing it ineffective). Undue optimism (which thinking traps?) also leads to the individual taking no action (believing it unnecessary). The optimum state of mind is in between: concerned enough to act. What engine process achieves this?
Rename: unsolvable or no-adequate-options?
Possible solution component: Priorities (Maslow) qv: balancing personal state of mind vs. broader goals.
opposite of optimism/overconfidence aspect of culture (qv)?
Result tends to be failure to deal with the problem and/or indecision (like no-urgency qv).