Hey Philly,
Maybe find other people depressed and bitter about the same thing/s and maybe you can connect with them more easily? Using black humor or such maybe?
It's difficult to keep things 'bottled in'... so it's good if you have at least one or two 'outlets' - either creative outlets like writing online or writing BAD country songs or such, or sports etc, and/or genuine people to speak with who can 'get' what you're saying...
Sometimes you may find that just expressing your feelings can help, nothing needs to change overnight (it rarely does, usually) and finding other people who feel that way (about a specific something) can help big time too...
With people who don't know you so well or who might not 'get' what you're saying, it's maybe better to be polite and detached... but if someone is 'violating your rights' then some assertiveness may be needed, and a good discussion and letting your feelings clear... remember 'your needs are as important as other people's too' (it took me a while to get this, and still learning sometimes...)
It's not easy sometimes, and it does happen to everyone.. you can't be 'upbeat' all the time, and most people understand... It just depends what it's about and who you can trust...
If someone is having a rough time, or is too young to understand a specific situation or be able to help, or too overwhelmed with own problems... then maybe they might not understand what you're talking about, and maybe you won't get a response that would be desired..
If you feel overwhelmed with certain tasks, it's better to find a different way of doing them, maybe different schedule or arrangement etc. or maybe take a 'mini vacation' or ask for help from others or delegate things etc.
It also depends on the situation.. At work or eg as a mod, certain politeness is kinda expected... Maybe you can share frustration with a trusted co-worker (though it's good to be careful at workplace about these things, or at least choose location wisely so it's not overheard by those who perhaps better not hear it) or mentor or informal mentor, or older member of family etc. They can shed some light on things maybe..
give in and act how I feel - how exactly would that look like? Black humor? snickering at people? Saracasm is usually not good to use in communication, especially online, it can be misunderstood..
Expressing frustration with something can be constructive too, though... Depends on how it's done..
Maybe other people are not happy with the situation either and would be happy to make a change, and maybe together you can figure something out?
The idea is to be respectful while telling your opinion etc, if you can. (Or have a break, maybe go jogging or boxing and venting elsewhere and maybe try to be respectful and genuine *then*, might be easier

)
Anyway, wishing you good luck!!
