ned et al posted after i wrote the title. you can't use time travel to get there.

The first relevant dictionary definition I could find of the word shady is "of doubtful honesty or legality".

Fact: I made a withdrawal.
Fact: Bittrex, on my account page, indicated that the withdrawal was complete.
Fact: The withdrawal was, in reality, not complete.
Fact: Bittrex, at the time i made this post, had offered no explanation for this discrepancy

Indicating that a withdrawal is complete, when in fact it is not, then failing to offer an explanation of the discrepancy is an action that would cause someone to doubt your honesty.

Now, if I had said "Bittrex is super shady" rather than "bittrex is acting super shady" you might have an argument.