The Rad Trads are not radical rebels, but instead are radically obeisant. Because they are believers in the true Magisterium of the Church they believe they must defer to their local bishops regardless of their bishop's rulings.
Michael Matt of The Remnant, a key Rad Trad group, recently put out a video where he begged priests to have the courage to go against their bishops and continue to conduct Masses in the traditional Latin format. He did not beg his fellow laity to show similar courage. But implied that the laity should continue to pray the rosary and hope that a priest in their parish would show the necessary courage.
So there is nothing to fear from the Rad Trads or the rosary, unless God is listening and decides the US is still worth saving.
Being a post Vatican II baby, I have never attended a Latin Mass. I've attended lots of hippie/folk masses in the 1970s, which even as a child, I found, errr, uninspiring.
I started attending a Latin mass about 2 months ago "to see what all the fuss was about." The only one in our town/county of 1 million. I was blown away by the reverence and piety of the parishoners. The notion that the Pope and many Bishops want to shut down the Tridentine Mass is simply astounding.