I totally know what you mean about not looking forward to feedings. Adalyn would have "episodes", even after we got her home, where she would desat and brady. It was so frustrating when the feeding would be going so great and then, boom, brady and desat. She was on oxygen and an apnea monitor at home, and we knew what to do (bump up her oxygen, stimulate, etc) and she always came right back, but it was really stressful. Looking back, I still can't believe all that we went through when we brought her home and dealt with all of those choking/desats. As PPs have said, it does get better, so hang in there!
For us, we had to try to find the best nipple for her, and then the best position. What worked for us in the NICU was to sit her on her butt and hold her upright with the bottle. In fact, I still feed her like that on my lap (although it seriously hurts my hand now that she's so much bigger!) We did have some luck with having her eat on her side (my dad said she was like a Roman emperor, being fed while lazying about 
), but then it stopped working.
GL! I hope your little girls have better feeds tomorrow!