I have been in exactly that position. I don’t know if my problems were “serious”, but I wanted to spend some time talking them over with Jesus, and I had about an hour where I could do this. (Being a wife and mother, your time is often not your own.). There is an adoration chapel where I could have gone, but I remembered there was parish not too far away that had an evening Mass, and I figured that was the better choice - to spend some time in prayer, but also to receive Him.
I got there nice and early - at least 20 minutes before Mass, and already the Rosary was in full swing. I didn’t know; I don’t usually go there. I wanted to pray before Mass, but not the Rosary. Finally they reached the end of the Rosary,. and I thought there would be some blessed silence, but I was wrong. Then there were another 19 prayers tacked on to the end of the Rosary.
I really felt bad that I was so annoyed at the Rosary, so the next time I went to confession, I brought it up and asked if I was wrong. “Absolutely not!” my confessor told me. “And that is one reason why you will find silence before our Masses. If ‘they’ want to pray the Rosary, there is no reason why they can’t pray it silently.”
One of the many reasons why I love my priest. You can hear a pin drop before any Mass at our parish, and it is awesome. Rare, blessed silence!
Perhaps it would be better to start the Rosary when you arrive at church 40 minutes early, and then it would be done by the time most people start arriving for Mass. Just a thought.