Biden did not promise broad forgiveness on the campaign trail, he said he was open to it. He made no promise at all, much to the irritation of progressives.
What his admin did was 100% pushed for broad forgiveness anyway, in the only way possible. Since he couldn’t get it nby law done due to the GOP in the house and senate, he used the executive power he was granted by law, but the GOP supreme court found a flimsy excuse to stop it. How is that Biden failing in anyway?
He did have the power to keep them deferred, but he had to give that up to prevent a ugly government shutdown. He made a concession, because in a divided government that is something you have to do to keep the government working.