Here to "devise shame" means that the plans that the man devised have resulted in shame. One possible meaning is that the word "house" is a metaphor in which the Babylonian empire is spoken of as if it were a house that the man has built. Alternate translation: "By your plans, you have brought shame on the house that you have built" Another possibility is that the word "house" is a metonym for "family." Alternate translation: "By your plans, you have brought shame on your family" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]])
Killing many people is spoken of as if it were cutting those people off, like one would cut a branch from a tree. Alternate translation: "killing many people" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The idiom "to sin against oneself" means that the person has done things that will result in his own death or destruction. Alternate translation: "have caused your own ruin" or "have brought about your own death" (See: [[rc://en/ta/man/translate/figs-idiom]])