It happens that planes break down, it happens for all airlines. And sometimes you even have to wait a day at the airport for a replacement plane, too, nothing super scary.
But what happens when you try to get money for a delayed flight probably only happens with Wiz air. We also flew back to wizz air and it turned out strange - one of our family members could not check in for the flight. Since we were already burned and paid € 20 for check-in at the airport per person, we were very persistent and we were in 40 minutes (!!!!) nevertheless, it turned out to get through to a paid (for us) number and they were able to manually fix the registration problem with great difficulty, but only on the third attempt. We are lucky that the children speak English well, otherwise it would most likely have turned out that we would not have been able to fly away.
And now the most important thing!!! - why did this problem arise - the person for whom the check-in did not take place and 90 € appeared on his wizz air account, because of which it was impossible to check-in. And the money came from the fact that we asked for compensation from the Airline for the flight delay (by the way, "for some reason" we received not € 400 according to EU rules, but € 90). And here's how it turns out: the airline decided not to allow this daring passenger to ask for a refund on board.
I fly this car regularly to Europe. There is only one delay in departure for ten flights. At that time, the passengers were already on the plane. We waited for 40 minutes and flew. The crew is always polite. I buy everything in advance on the website (luggage, seats, registration) and there were no problems.