'Offending' the Tai Sui is actually just a figure of speech. In truth, the Tai Sui probably doesn't even know you exist, being an impersonal cosmic force.

As the Tai Sui star travels across the sky, it passes through the stellar sectors corresponding to various constellations and therefore zodiac signs.  The resulting interplay of cosmic energies (conflict between the energy of the Tai Sui star and that of the various constellations) exerts an effect on people whose birth dates correspond these zodiac signs. This effect can be quite devastating, resulting in physical illness, misfortune and the like. Rituals to 'appease' the Tai Sui (in actual fact, to stave off the negative interplay of cosmic energy) are thus performed in order to avoid adverse effects.

The seemingly random ill-effects that Tai Sui can cause have led to its personification as a wrathful deity by the name of Marshal Yin Qiao/殷郊, whose story is a tragic one.

The son of the cruel King Zhou of the Shang Dynasty, Yin Jiao was born a formless lump of flesh. His father's equally wicked concubine, Da Ji the fox spirit, convinced King Wu to execute Yin Jiao's mother, the queen, on account of her 'giving birth to a monster'. Abandoned in the forest, the lump of flesh was discovered by He Xian Gu of the Eight Immortals (whom I have spoken about earlier in this thread). She recognised it for an immortal embryo; cutting it open, she retrieved a healthy baby boy from within and raised him like her own child.

Yin Jiao developed tremendous magical power as he grew up. When he came of age, He Xian Gu revealed to him the truth behind his birth; he flew into a terrible rage and swore revenge for his mother. Yin Jiao joined forces with a rebel alliance who sought to overthrow his father, and helped them to seize power after a series of massive battles. Da Ji died at Yin Jiao's hand, while King Zhou committed suicide rather than surrender.

Having such a messed up childhood, it's small wonder that he's so angry all the time and randomly lashes out - well, that's how the story attempts to explain the abovementioned cosmic principles, anyway.

Since you mention King Zhou, let me say something outside of this thread's general topic.

King Zhou of Shang 商纣王, the last King of Shang dynasty商朝 (Around BCE 17th century till BCE 11th century), is not named as Zhou 纣, after all.

His real name is Zi Shou子受 (some claim is Zi Shou De 子受德).

After his defeat in the Battle of Mu Ye 牧野之战 to the famous King Wu of Zhou 周武王, he burn himself to death at Deer Terrace Pavilion 鹿台.

King Wu of Zhou then gave him the posthumous name谥号 of Zhou 纣, citing him as the one “that destroy Righteousness and harm virtuos” 残义损善曰纣.

While at the same time, his people gave him the posthumous name of Xin 辛 (One of the Heavenly Stem of the Sexagenary Cycle System), which till today, most scholar have no idea what it signifies.

Also, if you read ancient Chinese history close enough, you will find that his so called "evilness" highly resemble those in the King Jie夏桀王 of the previous Xia Empire 夏朝

Maybe this is some work of defamation, huh? 

Shhh.

When the legend becomes fact, print the legend.