Bottle nipple help!

I don’t know what to do anymore and I’m getting frustrated. I have the Dr browns and Avent bottles. My 1 month old takes over an hour to eat on size zero Avent bottles and won’t finish his feed cause they are too slow of a flow and the nipple constantly inverts on him than he gets mad and just stops feeding than 20 mins later he wants to eat again so I upped the nipple size to a 1 and in the day he does okay on it but at night he sucks sooo hard to the point he is gulping and choking on it and than refuses to feed. I have the slowest flow for Dr brown as well and he just screams on that bottle as well. I’m at a loss now and starting to get frustrated cause I have bought so many nipples and right now me and husband can’t really afford different bottles.