I don't know how many other mamas both formula feed and breast feed, but I feel like I am in two worlds of feeding. I can't EBF, but I don't EFF. I have resented the bottle for months now and been angry at formula for it's ability to be mixed up ready to go in seconds when I can only pump 1 oz per 15 minute session.
FWIW, I am lucky to pump a half ounce in 20 minutes, but my babies can get out what they need in five or ten. It could be at least partly a pumping issue. I don't know your specific situation though.
Its so good that you are at peace! Enjoy your babe!