Dooku did not lose the force battle. Dooku was on the offencive and couldnt get a hit because Yoda blocked him.Yoda didnt do any force attacks (why we dont know) but from the movie they clearly stalemated.
Yes, he lost. Yoda didn't attack back because he didn't want to. Are you suggesting that he didn't use Force attacks because he was unable to? No, Yoda tossed all the objects Dooku threw at him aside with ease and caught his lightning without difficulty.
The lightsaber duel was also stalemated with neither being avle to strike down their opponent. Dooku did leave but for what reason we dont know. He might have known clones were coming, maybe he had to meet Palpatine, MAYBE Yoda was winning. We just dont know. I mean he could have needed to take a shit for all we know. But the fact remains that neither bet the other in both force abilities and saber skills.
Yeah. In ESB Luke probably left cause he needed to take a shit, too. Cause he definately wasn't losing. 🙄