Yes, some catholics does favor Mary over Jesus in practices, but not all catholics are like this. This is wrong practices (thus not the teaching of the church). One should pray to Jesus more than to Mary.
To believe too much in our own works drive us to believe more in Rosary and Novena than in the bible teachings. And I would say it openly and out loud : this is not good. Rosary and Novena is good to help when one is so “distressed” so he can’t pray anymore… then he need help from mother Mary and the Saints. This is OK. But if we put our hope in Rosary and Novena to solve our problems… “the more accurate the novena, the better”… this is wrong, thus not a good practice of faith. Mary and the Saints are to testify Jesus to us. They are not supposed to be the focus. We are to focus on Jesus only.
No matter how holy Mary and the Saints much more holy is God in Jesus Name. We are to see Mary and Saints as our “human examples” but Jesus as our “brightest star”, in whom our we put our deepest hope of salvation. God is our healer, our provider, our protection, our counsel, our redeemer, the mediator of the covenant is Jesus. Mary is the ark of the covenant in the sense that she carries Jesus’s body for nine months. But we are to believe in Jesus, we are the ark of the covenant forever in Jesus Name provided we carry this covenant in our hearts and hold on to it. Mary believes “the good news” (the annunciation) so she becomes the ark, so are we to believe in the good news, we carry God’s covenant in our hearts always.