There are plenty of sycophantic humans around, especially with regard to relationship advice. I find there is an inverse relationship between how willing people are to give relationship advice, and how good their advice is (whether looking at sycophancy or other factors).
Yup. I know too many people who have a default message when asked for relationship advice: oh, my, the other person is terrible and you should break up. It's an easy default and it causes so many problems.
The opposite, encouraging people to stay in a relationship when they should leave is also damaging.