Complex sentence: It implies that dark times and difficulty follow in his wake, that he always brings ill news, and its meaning is consistent with the opinion amongst Gandalf's enemies that he is a troublesome meddler in the affairs of others.
Split into simpler sentences: It implies that dark times and difficulty follow in his wake, and that he always brings ill news. Its meaning is consistent with the opinion among Gandalf's enemies that he is a troublesome meddler in the affairs of others.