Correct usage.

The Instagram account had photos of the actress, and three captions' worth of confirmation that her jokes have not received the same upgrade as her photo quality.

Is the apostrophe correct on captions?

He was late for work and got fired, besides, he did not like the job anyway.

He was late for work, as although he needed the money, he didn't like it.

Do we class the information after as and besides as an independent sentence or subordinate ?

Or should it be written like this ?

He was late for work. As although he needed the money, he didn't like it.