[mishftw]

There are a couple assumptions you're making here. For instance the firing (from your perspective likely but will they really?). Take a step back and take stock of the situation.

Communicate with your manager. Your manager not being there in that meeting definitely didn't do you any favors. Make sure the both of your are on the same page. They should have been there to deflect. Be proactive about communicating and making sure everyone is in alignment. Easier said than done especially if the company is smaller or the manager is busy. But a 20 minute time investment per week will be worth it.

Figure out why this happened. Figure out what can be fixed and move on. But be vigilant because that kind of behavior is frankly uncalled for. On the other hand getting a new job in this market should not be too hard.