You could increase bed temp to 60 C for pla. On what surface do you print? Try with PEI sheet, pla sticks very well to it. I prefer glass with 3Dlack, for easy removing when cooled down and nice smooth side. It could also be a problem of not 100 % leveled, or your Z offset to high.
I would print your item standing up with a brim, like in the picture.
Use different slicer, like Ideamaker, it's very easy to set up custum supports where you want with Ideamaker. It's also possible with cura, but it's more complicated.
example air cond.JPG