I took from the TP that the direct manager was meant to attend the meeting but couldn't for reasons. Obviously the meeting should have been rescheduled. I also

I took from the TP that the direct manager was meant to attend the meeting but couldn't for reasons. Obviously the meeting should have been rescheduled. I also got the impression that the manager's boss was venting... presumably they were feeling some pressure from elsewhere to deliver the project. Not a great sign that they took it out on the junior, but this would normally be the job of the middle manager to deflect / explain / shield the junior from. To the OP: try to not take it personal, the manager's boss was almost certainly venting their own frustrations and "taking it out" on you. Very unprofessional but it happens. It's very unlikely to be a real reflection on your performance. Try to take it as a growth experience to build a bit of "thick skin". You shouldn't have to but it helps to have it (especially if in future years you become the middle manager who has to absorb the venting). Hopefully your direct manager will give you more useful feedback on your performance and perhaps explain the boss's frustrations.