When "though" is used at the end of a sentence, it serves a similar purpose to "but" at the beginning of a sentence. Both words are used to introduce a contrast or an exception to what has been said before. "Though" is more casual and often softer in tone. It adds a contrasting idea more subtly.It allows the conversation to flow more naturally and smoothly. It's like adding an afterthought. Using "though" at the end tends to place less emphasis on the contrast and more on the preceding statement

How to use "though"

Thought experiment

A thought experiment that will break your brain | Bryan Johnson

The scumbag cheated on his wife and thought he could control her, but he was sent to jail by his wife soon! 渣男出轨还以为能控制富婆妻子，没想到反手被妻子送进监狱！

Exercise Thought Control!