In the Iliad, the gods and goddesses play a very important part. In order to answer your question, you might want to explain that this is because the ancient Greek faith believed that the gods were anthropomorphic. This means they had the appearance of humans, as well as similar characteristics and feelings. As a result of this, gods and goddesses did not just watch life on earth unfold, they actually got involved themselves and actively intervened whenever they wanted.
I would definitely interpret the involvement of the gods in human life as very negative, as this means that humans do not really have any free will to decide over their life and fate. Unlike the benevolent, forgiving God of Christianity, the greek Gods and goddesses are very selfish and self-centered. They are often very jealous and passionate. Their main interest is not to help humans, but to help themselves. For example, according to the Iliad, the Trojan War would not have happened had it not been for the gods' involvement: it was an argument between the goddesses Hera, Athena, and Aphrodite that ultimately led to Paris abducting Helena, as Aphrodite had promised Paris Helena's love in return for the apple. The abduction of Helena, caused solely by the godesses' involvement, led to the Trojan War. This is probably the best example to show how the gods' involvement in human life is mainly negative, as it shows how selfish the gods act and how little they care for human life. Their involvement clearly caused a lot of aggravation and destruction that may not have happened otherwise.