Rooney ended his barren run in front of goal in impressive fashion as United qualified for the group stage of the Champions League following a comprehensive 4-0 win (7-1 on aggregate) over the Belgian club.
"If I didn't have a strong character maybe that would have affected me, but I know my quality, I know what I give to the team and if the goals don't go in I still bring a lot to my team-mates," Rooney told BT Sport post game.
"Thankfully I got the chances tonight and I stuck them in.
"I wasn't worried, if it was going on for three, four, five games more then maybe so but it's early days and I knew when the chances came I'd take them.
"As a striker obviously you want to score, everybody goes back to last season and it was so many games without scoring, but a lot of top quality strikers are yet to get off the mark at this stage.
"I understand because of my name and because of who I am it will get publicised a lot more. That's my job and I understand that."