Which version? I'm upset, because I try hard...

Or do you have a preferred rewrite and why?-- Oh, thank you! I thought you'd never ask!

I'm upset because I try hard to please my boss but she always puts me down.

I considered that, but it didn't seem constructurally smart:

I'm upset (main clause)...Why?

Because I try hard to please my boss (dependent)

And I believe the final part of this sentence relates to this dependent clause-ie. the two dependent clauses answers the question of the main clause. Making it a main clause in a way seems to make it seem unrelated in a way to the

Because I see the speaker as uttering the whole thing in one heated breath. (Notice that my version is shorter and more direct, however.)

What if you weren't trying to convey someone was speaking. What if you just wanted to make a statement, without considering how it would most likely be said? Silly question perhaps...

Not silly, but I don't see how we could say it without considering how it would be said. If anything, we'd get even less punctuation!

Mister MicawberNot silly, but I don't see how we could say it without considering how it would be said. If anything, we'd get even less punctuation!

Hmm, I would have thought the sentence would be more structured if it were not mimicking speech. That's why I thought we would keep it parallel, with two dependent clauses, both functioning the same way, i.e