TL;DR
Bought carpet from friend. His one tenant is a carpet/floor installer. After 18 months, they delivered carpet, but people drove on my back yard, without permission ripping up grass. 


 Friend bought a new store and everything inside including a lot of carpet. I bought some of that leftover carpet. He rents out part of it to a carpet/flooring guy “Carl”. 
He suggests asking the other guy Carl, who is a carpet person if he can deliver to me, without doing install. I ask Carl, who says yes. About $80 for delivery (I think it’s about 10 rural miles one way). I ask him when he can deliver, he says to let his assistant let him know. Long story short, 18 months later he finally is the one to reach out to me, this morning. “Can I deliver in 45 minutes &amp; what’s your address”, I say yes. 
About 90 minutes later call from his assistant “what’s your address”
My intent was to help Carl, move it from the driveway to the basement using external door. It’s about 65 feet from driveway to basement. And tip Carl 5 bucks for having to move it semi far (can’t just drop off in garage). 
10 minutes later I hear a car in the driveway. It’s not Carl, but helper dude #1 &amp; #2. I meet him outside. He asks where it’s going, I show him the basement. He says “is this the only way in” to which I say “the back is a bit flatter” (the grass is wet from rain&amp; front is definitely more of a hill downward slope). 
He says okay. I go inside to debate with the wife if I should give them a 5 to split, 5 singles, or 5 each. She says I should tip 5 each. As I go to grab another 5, I see they have just driven their van onto my backyard, right up against the basement door practically. (Reduces 65 feet distance to maybe 15)
I am livid. My backyard has been a mess, but I spent about 2k and 200+ hours of work this summer getting it to be absolutely beautiful. And they just fucking drove on it, obviously ripping up grass that will now need to be replanted/etc. all without asking. 
So now I feel like, douchebag owner didn’t deliver carpet (no rush tbh) for 18 months, dodging calls throughout, asks me for address and gives me 45 minutes notice. Comes about 2 hours later. And his asshole employees ripped up grass without asking if they could drive on it. So, I know I wouldn’t tip a horrible waitress/for a horrible experience. So why should I tip these guys? 

On the other hand, if I go to a restaurant, and food blows but service is okay, I would still tip. 

Or am I just overthinking all this lol. 