Need urgent help to improve print quality!!

I need to print some architecture models in my Ender 3 Neo, but no matter what the beams always came out ugly or they straight up fail to print. I already lowered the print velocity (currently at 40mm/s), the layer height (0.15mm), the temperature (195°C), increased the retraction distance (7mm) and enabled the z hop.

I would greatly appreciate any recommendation to improve this!