Let's be honest here. People can see that your writing sucks. Well, maybe not yours, but someone's. And I can tell you why. It's a writer's improper use of as few as one or two words.
For instance, the two-word phrase, "some day," consists of an adjective ("some") and a noun ("day") and refers to a single SPECIFIC day in the future. Although it's a specific day, you refer to it as "some day" when you don't know which specific day or you've forgotten it. Nevertheless, it specifically exists. (That's what the "some" in the phrase is doing--defining which day.)
"Someday," on the other hand, is a single-word adverb that refers to future events that will occur on a single day that is still indefinite or unknown in time. It's a nonspecific day because there is no adjective that can be inserted without breaking up "someday" into two words. "Someday" is a single non-modifiable adverb!