Again, here is the link to the article:
Dating Questions Posed to Rav Chaim Kanievsky Shlita and Rav Aron Leib Shteinman Shlita
Here are the key words:
– Rav Shteinman
The clear meaning seems to be that the reason she wanted a divorce wasn’t to find a better husband, but to escape a bad marriage. However, rather than try to make the best of it and try to fix the marriage, she figured she’d get divorced and remarried, and now regrets that she didn’t stay in the marriage and try to work on it.
The obvious lesson R’ Shteinman is trying to impart is that one should do their utmost to fix a an unpleasant marriage rather than leave, and wouldn’t likely be telling the story if he didn’t feel it was a common occurrence.
The word criminal (which R’ Shteinman is not quoted as using) is obviously an exaggeration, but the negative effect on children is known, and in cases (whatever the percentages may be) where parents took what they thought was the easier way out when they could have fixed the marriage through hard work, they do bear responsibility.