I don't really like to lay judgment on religions, especially not Catholicism (even though it does have things I highly do not agree with), but this part here.....
It started around 110 AD with St. Ignatius. In his writing of the Letter to Polycarp, the groundwork was set for the bishop to be given power to bless a marriage, as well as annul a marriage (based on certain reasons).
Popes Alexander III and Innocent III concurred some 1,000 years later.
It has been a thing ever since.
Since
when did the Bible ever give any human the right to annul a marriage? In fact, Jesus said quite the opposite: Matthew 5:32 tells us that no one may divorce, unless infidelity was involved.
So unless those "certain reasons" were "infidelity", they're in the wrong. And Jesus never said that said divorce must be done by any sort of priest, in fact, nowhere in Acts or any of the Epistles, or the Gospels does it say that we ought to have a ranking structure in the church, with the exception of some "Elders" that look after everyone else, kinda like church pastors that you see in Protestant churches.
In fact, you see the argument around that the Early Church didn't even have physical buildings that they met in, they actually met in random peoples' homes and it was just a group of believers gathering together, an elder or two teaching and exhorting Scripture to edify and instruct newer believers.
Somehow it went from that into a rank structure, to a ridiculous palatial city lined with gold and jewels with enough wealth to feed all of Africa for years. Did Jesus ever wear expensive jewelry and clothing? They gave Him a colored (most movies depict either red or purple) robes right before His crucifixion (the robe that the roman soldiers cast lots for because it was too precious to break into pieces) but otherwise He was portrayed as the most simple, and humble teacher to ever walk the Earth. In fact, He made it a very big point when He sent His disciples out two by two, that they should bring with them no money, no written accounts of money (scrip), nothing but one set of clothes and a wooden staff. They weren't even permitted to carry with them a change of clothes.
If Christians are supposed to emulate Christ... where does the pope get off with his gold jewelry, his hat with gold all over it, the pontiff's seat with the gold and jewels all over it, and the clothes he wears that you see him in sometimes, those are surely worth thousands of dollars. One of his outfits is probably worth more than I make in a year.
I don't see "Christ" in that. I really, really don't. That's why Catholicism bothers me, it is so.... unlike Christ. That's to say nothing about purgatory, praying to Mary and other saints (the Bible says that every saved Christian is a saint?), and other weird practices that they do.
Protestantism might have started with a king and his lust for women, but I'm sure plenty of people were uncomfortable with the practices of the RCC just like I am. That's probably why so many people in England were so quick to get on the boat.
EDIT: I am NOT saying that Protestant churches are perfect either, plenty of weird practices/doctrines there too (Replacement Theology for one).