What does this poem mean? Get rid of it to help solve it, and get extra points!

To put it simply, the author thinks that the "Jun" in the article is sorry for his painstaking efforts, and he is both sad about his misfortune and angry at his indisputable.

Show that you have done your best to the other party, but the other party is not willing to be down-to-earth and will only feel sorry for themselves.

The last few words should be written by women to their lovers. On the whole, I still hope my lover can cheer up, but I am so sad that I have to give up.