No brake assist

Hey everyone, new here. Got an issue and im currently stumped

I've got a 2010 escape xlt awd, 2.5 liter

Master cylinder went bad, replaced it. Blown brake line, fixed it, brakes bled.

Then it felt like my brake booster went out. Replaced the brake booster, no improvement, no vacuum leaks I can find. Anybody know what it could be🤷🤷 thanks in advance 👍