Gibberish: The 70 years was fulfilled at the ending of the 70 years marked by the return of the Jewish Exiles in 537 BCE
No, the 70 years ends, then Babylon is called to account. This is the order objectively, clearly stated at Jer 25:12. And that fits with 2 Chronicles. The Bible need not contradict.
The servitude began with the beginning of the Exile with the Jews being deported to Babylon
The servitude was many nations to Babylon (v 10,11), and was already ongoing at the time of Jer 25 - see v18 "as they are today".
You don't even need to get into contemporary sources. A grammatical reading of the text rules out WT chronology.
..for no other theory or viewpoint makes any sense.
Except the one that allows Jer, Chronicles, and history to agree.
Babylon was already brought to account with the release of the Exiles after its Fall in 539 BCE and its eventual desolation as foretold by Jeremiah.
You concede WT chronology is incorrect. If "Babylon was already brought to account with the release of the Exiles" in 539, and Jer 25:12 states the seventy years ends before the calling to account, then the 70 years ended 539 or before. But definitely not 537.