Seen toxic relationships, been in 2.
Men IMO marry to get sex without having to go look for it, women marry for security and children, IMO.
My first partner was my age, second half my age. Both were as toxic as the other. IMO age has nothing to do with it. I've known school kids with more maturity than some adults I knew well.
BTW, far as I have seen, Thai female children support the parents while the boys go out drinking, gambling and fornicating. My Thai wife's first husband did that on her money till she divorced him. Apparently her father forced her to marry him.