Should you expect to be happy most of the time? I feel like a lot of youngsters self-diagnose themselves with depression/bipolar disorder because they feel they

Should you expect to be happy most of the time? I feel like a lot of youngsters self-diagnose themselves with depression/bipolar disorder because they feel they should be happy the majority of the time, then feel there is something wrong with them if they aren’t. Tangentially related: why are some people always in a bad, meanie-pants mood? Don’t they too believe happiness is a mindset they can just be in if they want to?