Dr Browns bottles are genuinely worth a try! They're really not as fiddly as people make out, if you're already using mam, I don't think they're any fiddler! The only thing is you HAVE to either microwave bag sterilise or cold water sterilise, you can't do the microwave without a bag method that you can with the mam ones.
I was with my first, he’d scream all day every day for around 2/3months but I forced myself to go out and just walk with him in the buggy, I was lucky if he fell asleep and then quickly went and grabbed a cup of tea in silence 😂
I was same for about 6 weeks. He is a bit better now, he still has colics but not as bad plus mint tea helps( natural mint tea)Have you tried mint tea? Give him a couple of ml of mint tea and his stomach will settle.