Most Annoying Downstairs Neighbors!

So I live in a house but with three sections and our family rents the upstairs. This new couple moved in and they were really nice, cute and tiny couple. Like no more than 5’1 and 5’9. But they stomp like BIG FOOT going into battle. Literally I put a cup of water down and it shakes whenever they walk around. They drop stuff loudly on the floors and we can hear it from upstairs. Their stomps shake the ENTIRE HOUSE. It’s ridiculous! They talk loudly and yell like they’re the only ones in the house. To top it all off, the food they usually make REEKS. And it slips through the vents and it gets into our part of the house. It’s everywhere. On our clothes, bedrooms, living room, etc. It sucks because our new landlord is friends with him and it feels we can’t say anything to them. But that’s not going to stop me. I live and pay rent here. We’ve been in this house for 15 wonderful years and they just moved in. Cmon now. We have been hospitable, nice, even welcomed them to brunch to which they declined. Perfectly fine. But it’s start to get annoying now. To the point where none of us can sleep.