As others said above, all are common issues but all at once is unusual. It can still happen. We've had to have a genset worked on twice during a trip. Had the A/C fail and it couldn't be fixed - we were offered another boat, but with only 2 days left and us switching boats for a 2nd trip with another group anyway, we just lived without it.

Never had a broken wind gauge. Would be a problem most trips for us as we've usually been on a cat where you need to know the wind speed.

The real question though is how did they handle it? You should at least get a discount on a future trip at a minimum. Then again, this being your 2nd trip that clearly wasn't great, you may not want to charter with them again?