Disappointing service and lack of management

My experience was terrible as the flight was delayed due to software issues. I understand these sorts of glitches do occur but the way in which the whole situation was handled was unprofessional. We were told initially that few minutes for the engineers to reset the system, but it took forever, and eventually, we had to disembark to reboard on to another flight. Firstly, the software was being reset from outside, then they had to open the door for paperwork, then there was no procedure, then the procedure had to be sent from their office, then they needed special tool to open one of the panels which they didn't have. From 4pm to 6pm we waited as the above-mentioned commotion unfolded one by one. No courtesy from the cabin crew to offer some snacks to the kids as the wait was too long and the kids were getting agitated. Upon asking, the crew said they can only offer Vida small dark chocolate (really for kids of 3yrs age!!!). Eventually disembarked and we were told that we are going to the lounge where further instructions will be communicated. We were taken to the arrival baggage carousel and were told to collect our bags and re-check in at the check-in counters as our new flight was going to depart in an hour's time. After waiting 15 mins or so, the bags didn't come out, then we were told that leave the bags and proceed to security check-in and boarding if we still have the old boarding pass. They would do the bag transfers. After completing the boarding process again, we eventually sat in the new plane after more than 3 hours of delay. Again, I asked the cabin crew of the new flight while we were waiting for passengers to board which was taking too long to give some snacks to the kids as they were crying out of hunger. Much to my surprise after the lady consulted the supervisor, I was told that the snacks are being loaded at the back and they'll give it to us after the take-off as normal process. The whole experience was so disappointing, and the service was pathetic as there was no proper management of the situation - staff just looked confused. Please train your people properly to handle these situations efficiently. Also, they need to show courtesy towards kids as the problem **** with Lift and not us. How could you not offer something for kids!!! I wouldn't like to recommend anyone to use this airline that can't handle or manage issues properly. It's not the 1st time that I have faced delay issues with Lift - it seems to be common.