Complex sentence: Despite the rocky start, Hershel understood he could not stop his daughter from wanting to be with Glenn, and while the majority of the survivors were kicked out by him, Hershel accepted Glenn's decision to stay with Maggie.
Split into simpler sentences: Despite the rocky start, Hershel understands that he cannot stop his daughter from wanting to be with Glenn. While the majority of the survivors are kicked out by him, he accepts Glenn's decision to stay with Maggie.