An atheist scum is speaking through her or his insecurity.
Listen, a woman agreeing to a predator without proper legal documentation has nothing to do with Islam. As a matter fact, Islam eliminated what you charged by having shuhuud (winesses) and the weli involved in as a guardian. Islam also requires that the sheikh who is carrying out the nikaah be an established Islamic scholar. Islam also requires the mehr agreement to be documented.
With that in mind, if some people aren't following those requirements, it is their shortcomings and Islam can't be blamed on their lack of knowledge. The whole idea of having a weli is to make sure someone who has the lady's interest is helping her to choose a suitable spouse. And when people are in love, many times emotions overtake their brains and they can't think through without having those emotions deluding their overall decision-making. This is where the weli can come in, ask the right questions, and then reject the guy if he is not suitable.
Sadly, nowaydays, some groups have made marriage like it is a piece of cloth that you buy from a store, you take it home, and if you don't like it, you just thrash it or return it to the story.