I work with old folks..... Happy old couples are FAR AND FEW BETWEEN.
Yup, I can verify that one.
However, there are some couples out there who are genuinely happy together. Usually it's because the man is very much a confident leader in the household. I've met a lot of women who won't shut up about how much they miss their late husband. But there's also a lot who will just mention him in passing without mentioning a single fond memory.
I think there's a definite line drawn between the two, and I suspect it all goes back to High Score Theory. The ones who are happy with each other or the widow misses her husband were usually married for an extremely long time; like 50-60 years. That means she married while she was 18-20, or possibly even earlier.
I really do believe it makes a difference landing your women young. The women who don't really care that their husband is gone either married a beta, or met him in their late 20s or early 30s after multiple encounters. I have an aunt who was thrilled her husband died, and exclaimed that being married is like "being in fvcking jail"