the thing to understand if you talking Robotech is like Ryllharu said there wear three series as far as i could tell.

Robotech = Macross
Robotech II = Souther cross
Robotech III = hell if i know?

i rember there wear three series i watched as a kid Macross was fine and all im sure it was edited but all in all for its time it was pretty advanced stuff for kids to be watching at 6am in the morning.

Southern cross as i rember delt with Max's daughter who as it turns out was not relly his daughter but was made to be his daughter for continuity here in america? also in this one there were no valks or if there are they were mostly replaced buy these transforming hover tank things that nobody cared about.

And the third series i remember almost nothing of as the Valks were almost all but absent. and i seem to remember this being the one with the transforming motorcycles and the singer chick that was really a guy or some shit .... it sucked

in any case if it was not Robotech/Macross that you watched but one of the other two i can understand why you would think it sucked.