You only won 5-0? You poor thing. Perhaps I can offer you a hug?
Be grateful they were able to field a team...teams that poor often can't...and then you get a 3-0 victory. I won the league 4 seasons ago because I beat a team 11-0 and my friend was 'gifted' a 3-0 and then I won by 4 goals on GD. He was justifiably annoyed.
That is unlucky. Winning 5-0 isn't something you should be upset about.