en_tn_lite_do_not_use/isa/47/06.md

I was angry

Here "I" refers to Yahweh.

my heritage

This means the people who belong to Yahweh.

your hand

Here "your" refers to the "people of Babylon" and "hand" refers to their power or control. (See: rc://en/ta/man/translate/figs-you and rc://en/ta/man/translate/figs-metonymy)

you placed a very heavy yoke on the old people

This means the Babylonians were even demanding heavy work from the oldest of the Israelite people. (See: rc://en/ta/man/translate/figs-metaphor)

as sovereign queen

This means the Babylonians thought they would rule over all other people and nations.