You should win at least 95% of matches against teams like this but on this occasion, you ended up with a draw, anything can happen in a 90 minute game of football and its not unusual to draw games away against teams with 10-15 quality less, especially if you don't turn up to the game and hand a 5% bonus to the home side. Last season I had a similar 1-1 draw away from home in the league but it was the only league/champions league game a drew all that season, I did lose once at home but that was because i played with a reserve team. Also chances are your opponent played with counter attack.