Anon, I probably hate yuri more than anyone else in this thread. I could write a book why.
But the couple is outright written as a joke. There is no effort at all put into Steve's character to hammer the point home that Diana's crush is shallow and meaningless. It's kind of sad because it's the 'easy way out', but that's how it is. There's no chemistry between them, just Diana sperging out.
Trust me I like the idea of Amazonian superwoman falling for a boyscout military man, but they just didn't put in the work.
Also Katana is the worst thing in the show. Her two-parter were the worst episodes so far.