Dr Browns bottles

I just bought the brand bc everyone raves about it but my son literally spit up the entire bottle before I could even sit him upright to burp him. it supposedly has a paced feeding but nope. Doesn't seem like it and he seems to still get air and these are the vented ones. I am pretty annoyed because I can't find a decent brand bottle. I used Avent Natural but they still give him bad gas. Which brands do you ladies recommend. He's breast fed but I mainly give him bottles of breast milk during the day and breast at night. -----------Edit------------ I do burp him often. I literally just burped him 3x prior and at the end bam he spit it all up.