There are many factors at work in Mexico, Latin America and South America and all over the world that is leading many Catholics to jump ship and become Evangelical, non-denominational Protestants.
First: There has been over the last 50 years a loss of Catholic Liturgical identity where many parishes try to mock Evangelical, Pentecostal worship in style and music thus rendering Catholic identity once very strong weak and a poor second to what we once were and what Pentecostal worship is. So it is no wonder that Catholics cooked in a more Protestant, evangelical style of music and worship would think nothing of changing over to actual Protestant worship that is far superior that what Catholics usually attempt in a liturgical setting.
Liberalism in Catholicism pushes people looking for certitude to Protestant sects who promote it. Pope Francis calls Catholics like this in a deriding way: fundamentalist. I think he’s glad to see them go.
Here is a story I copy from The Deacon’s Bench: