Should I complain to my landlord? *long*

My husband and I are newly married and starting our lives together. We currently live in an apartment in the basement of someone else's home. We've lived here for almost 2 months, and I know the previous tenants who lived here for 4+ years. It's a really nice place and I've enjoyed living here...mostly.

The man who lives upstairs in the "main house" area is an elderly man, "B". He lives alone and is generally pretty quiet and friendly. He raised his family in this house with his late wife. His SON now owns the home and is our landlord.

The son/landlord "D" is what I'd consider the ideal landlord. He's really accomadating, maintains the house/property well, and doesn't hover at all. For example, we had something leak and I sent him a text to let him know. He came over, fixed it, asked us if we needed anything, thanked us, and left.

B has other adult children and a handful of grandkids who visit often. One of his children has a wife and 2 kids, a girl who is probably about 7, and a boy who is probably 4 or 5. Obviously it gets louder when the kids come over, which is totally understandable and doesn't usually bother us. They run and play and jump. They're kids.

Over time, though, we've noticed other issues when this particular family stops by. First of all, the door into the house from the garage is right next to the door from our apartment to the main house. The door is locked, but there is space between the bottom of the door and the floor. The family likes to sit in the garage with the door open and smokes cigarettes for HOURS. This usually would not bother me at all, but it makes our apartment smell HEAVILY of cigarettes. My couch is starting to smell, my clothes stink, etc.

Second of all, the family will stop by in the week and spend the night. My husband and I both work early in the morning through the week, and this family is up stomping around and screaming and yelling until WELL after midnight.

Tuesday night of last week, around 11, we heard a big truck pull into our yard (everyone parks in the back yard). The truck was loud but they can't help that so I understand. After a few minutes of this truck running, maybe 40 ft from our front door, they BLARED their horn for a solid 30 seconds, long enough for my husband to get out of bed, go to the door, and look outside to see what the hell was going on. It was this family again.

So Wednesday, the day after the truck incident, I happened to be talking to the previous tenants of our apartment. I mentioned something about this family, and my friend told me that the family is mad because they had wanted to move into the apartment when my friend moved out, but D (landlord/son) refuses to rent to family.

Fast forward to today. My husband and I got home from work around 6 and the family was here. Through the window, we could see the wife standing at the kitchen sink doing dishes. We go into our apartment and instantly hear stomping and running and yelling, which is typical at this point. After about 10 minutes of continuous stomping in one spot, my husband takes our dog out to go potty. As soon as he walks out the door, the stomping stops. When he comes back, it starts right back up again. That's when he points out that the area where the stomping is happening is right above our couch, which is exactly WHERE THE SINK IS!!! It isn't even the kids! We can hear the kids running around in a different area but the stomping is obviously this grown woman!

I believe they're upset that we got the apartment instead of them, and they're trying to drive us out.

D has mentioned in the past that if we have any issues with his family (he knows how they are) to go to him. He's specifically asked us not to voice concerns to his dad, B, or anyone else but to only go to him and he'd take care of it.

In only 2 short months, I have about a dozen or more examples of this family being loud and rude and disrespectful. There is a ton of room for parking, but we've been asked to park in a specific spot, and we've come home many times to their truck parked in our spot. We've watched them sweep leaves into our patio area. We've watched them move their kids' bikes directly behind our cars. They blast music all hours of the night. They'll run the shower until there is zero hot water left, wait a few hours, then do it again. They stomp and run and scream. They smoke their cigarettes right outside our door. And when we cross paths, the glare at us or roll their eyes.

If it was only a few little things here and there, I'd be more inclined to let it go, but I think they're intentionally being disrespectful.

Am I reading too deep into this? Should I just let it go? Or should I talk to D about it? What would you do?