One thing that is always good to focus on at mass is whether or not we are offering the entirety of ourselves to God, as members of the living, breathing mystical Body of Christ, in atonement for our sins and those of the whole world.
If the words of consecration are valid, and the minimums of the mass are met, it is valid. We are distracted from our purpose at the mass if we act as theological Siskel and Eberts. If this is bothersome, approach father and ask him about it.
Otherwise I often observe mass with my glasses off, my eyes closed, so that I am not distracted from my main purpose there.
Just sayin’