Angels are not to be prayed to and we have made that pretty clear.
And if you can drop the catholic and protestant appellations for a moment, it will be much easier to see that.
As long as it continues to be catholics versus protestants, Satan has won.
Yet, y'all want to paint Catholics with the same arguments that continue to fail on the surface. As it's been pointed out before, this prayer, like so many others, calls on Mary, the Saints, the angels, and in this case St. Michael the Archangel to intercede to God on our behalf.
Wishing that away doesn't change what the prayer does.