Stack exchange has gone from useful site to a site where people try to close questions as fast as possible
This is definitely not true of the sites I frequent, including Unix & Linux.
People try to close duplicates as fast as possible because a duplicate gives you an answer immediately. It's more efficient for everyone, including the asker, than waiting for someone to answer the new, identical question.
I listened and took the time to try out the proposed solution carefully, but it did not work.
You didn't try out the solution proposed in the duplicate thread. It's understandable, because the proposed duplicate doesn't apply to your case. You tried out a solution proposed in a comment.
The constructive thing to do would be to point out how the proposed duplicate doesn't apply to your question. Namely, you're trying to redirect all local email, whereas person who asked the previous question was content to redirect one account and all the answers focused on that part.
Mistakes happen. When they happen, don't shout at people. Engage them constructively. Point out what the problem with. You did well to post exactly what you had done and the relevant logs. You seem to be good at dealing with machines. Try to also put a little effort in dealing with humans. Machines don't mind your tone, humans do.
I've edited the proposed duplicate and your question, and voted to reopen. As a relatively new used you might not want to take the responsibility of editing the older question, that's fine. What you should definitely have done is comment to the person who suggested that solution that it wasn't mentioned anywhere in the previous thread (which never mentioned wildcards). And of course to point out that your question is not a duplicate, you should make it clearer what the differences are, not write ITS NOT A DUPLICATE in the biggest font you could find.