Sasukes state of mind wasn't exactly the ideal one for analysing sitiuations, if you get my meaning. First he gets mentally tortured by his brother for the equivalent of tree days, then he finds out that the biggest moron in Konoha suddenly got stronger than him and then he gets his ass kicked by 4 sound ninjas. That's bound to cloud up your judgement a little.

He knew the price of the cursed seal, he knew Oro wanted him as a slave, this was explicitly stated to him from the 4 sound ninjas.. He just didn't care. Wether this is because of him being so arrogant that he thinks he can just break free later on or if he just doesn't care i do not know. And the reason he doesn't know anything is that noone ever bothers to tell him anything. If people had bothered to tell Sasuke that Oro wants him for his bodies sake, i think that sasuke might have had a change of heart.
And his ambitions to recreate the clan went out the window the moment he saw Itachi again. The only thing he cares about now is scewering itachi and piss on the remains. And besides, he can't recreate it with Itachi still around, os he has to take him out first. And in order to do it as quick as possible, so he can produce as many offspring as possible, Oro was the best choice. Provided Sasuke gets out of this mess, that is. Which he probably will. Of course, i'm not saying that's how he was thinking, but still, a point to consider.

As for the curse seal, yes, the ninjas from the sound village are pretty incompetent, that however doesn't belittle the effectiveness of the curse seal. The only thing the seal does is to give the user tons and tons of Chakra. Now if they are too dumb to be using it effectivlyso be it, but that doesn't mean that the seal is useless. In the hands of a competent individual (i.e Sasuke) the seal could be extremely useful.

And you still didn't answer the original question. What other options did Sasuke have that would yield a better result than him running of to Oro?

Eagerly anticipating you proving me wrong.

And good luck with your studying