Worst idea ever. The humidity goes right back into the attic. The duct needs to go up and out the roof.

Ditto, if the breeze is coming from the wrong direction what you propose is the same as venting directly into the attic.

We usually convert bath fans to ridgid pvc glue up runs and Pitch properly for moisture to run out not back into the fan assembly vertically thru a roof, rim joists are usuallly the ticket upper levels are challenging.

ok, thank you for that input. I will leave that vent alone, other than replacing the ugly bent looking grille. I thought it would have been an option rather than cutting a new hole. The other bathroom on the main floor vents out a side wall (northside of house) And i have never had any problems with it. The fan is installed on the ceiling about 4-5 feet away from the wall. Not sure what kind of treatment they did with that as it is original to the house. lol - that upper area on my side of house looks like a good spot. how about if i run pipe (not a flexible one) and insulate the pipe to a different spot and do same? (still kinda stuck there)

what if i did solid pipe to the vent and insulated it? and far enough away from attic vent so nothing flows back in that way? I've also seen vents that go on outside wall, and also ductless vents (did not look like a good choice).

The vent you are planning on using is a vent for your attic, it is not a good idea to use it for a vent, or to seal that vent up. Run your fan vent, through the roof where it is supposed to go, for best efficiency.