If a person sends away his Eved in a nice way with loads of generous presents to raise his self-esteem and improve his reputation (Ibn Ezra, Rabeinu B’chayei) then Hashem will give a Bracha in all that he does. But: אֹל ˃ֶניֵעְב הֶשְׁקִי “it shall not seem difficult to you” means that it should be done without difficulty and kvetching.
When a person does a Chesed with his whole heart, then it’s a totally different Chesed, and he deserves a big Bracha, like the Orchos Tzaddikim says a that when you do a Mitzva B'simcha you get 1,000x more Schar. Here we can suggest that the reason he gets such a big Bracha is because he believes in the words of Chazal who say: םֵחַרְמַה לָכּ םִיַמָשַּׁה ןִמ ויָלָﬠ ןיִמֲחַרְמ ,תוֹיִרְבַּה לַﬠ ב אנק תבש One who has Rachmanus on Hashem’s creatures, is himself given Rachmanus from Shamayim.
I know people who do loads of Chesed, yet they have all kinds of suffering. Perhaps they need to have Emuna in Chazal. I knew a Yungerman who was a big Baal Chesed and he was very successful. He told me that he sees openly, that whenever he does a Chesed, Hashem pays him back.
However, it may take a while to see the fruits of your labor. Hashem made this world for the human who needs to always work on patience. R' Zundel of Salant Zatzal said: הָבוֹטְל הָבָכַּע לָכּ Every setback is L'tovah. Being held back, being delayed, is actually a Tova. When you are M'kabel (accept) Yissurim B’ahavah, it brings Yeshuos, and being delayed is considered Yissurim.
