No, you have not abused the Sacrament! The graces of the Sacrament will help you to overcome your sins, mortal and venial, over time. The graces of the Sacrament will help strengthen your resolve to sin no more and to avoid the near occasions of sin.
I, too, confess generally the same sins every week. I can’t seem to get past them but I am getting better, with the help of God. Anger & Pride are not weighing me down as much as they used to and I’m more patient with others, My prayer life is more regular. I no longer do certain mortal sins.
Perfect contrition is repentance for sin motivated by faith and love for God. Imperfect contrition is motivated by a less pure motive such as common decency or fear of hell. The closer your relationship with God becomes, the more pure your contrition will be because you will be more focused on God and not on yourself. Either type of contrition is adequate for the Sacrament so try not to worry.
A firm resolution may mean decisions to make real and meaningful changes in your life towards ways that will lead you away from near occasions of sin. Only you know what those might be. Sometimes it may mean reading books, eg: if anger is your problem, read “Overcoming Sinful Anger” by Fr. Thomas Morrow.
You are on the right path.
Be at peace.