Sure, here's how you might introduce your worst vacation to a friend in English:

"Hey, so I've got to tell you about the worst vacation I've ever taken. It all started when we decided to go on this spontaneous trip to [Name of the destination]. The first sign of trouble was when we booked the cheapest flight we could find, and it ended up being delayed by 6 hours. By the time we landed, we were exhausted and irritable.

Once we arrived, the accommodation was a disappointment. The hotel room was tiny, with peeling wallpaper and a leaky faucet. We had to ask for extra towels and cleaning supplies every day, which just added to the frustration.

The weather was another letdown. It rained non-stop for the entire duration of our stay, making it impossible to enjoy any of the outdoor activities we had planned. We ended up spending most of our time cooped up in the room, watching TV.

To make matters worse, we got sick. Half of us came down with a stomach bug, which was no fun at all. We had to miss out on all the sightseeing and ended up spending our evenings in bed.

And just when we thought it couldn't get any worse, we had a run-in with some local touts who tried to scam us out of our money. It was a complete nightmare, and I'm still not over it.

So, that was my worst vacation ever. It's something I'll definitely remember, but not something I'd recommend to anyone!"