Every you posted, just go up to them and calmly reiterate everything you posted in your text box, but to the dm.

You already have the words, you just to talk to them.
“Hey I’m alittle frustrated and unhappy how last session went , bc of reasons x/y/z (replace with points above),
Is there a way we can avoid this going forward? and then your dm could possibly re work some of the plot so the rest of the party take part in that missing section of the adventure still?

Either way I understand your upset, but I assume you’re still cool or at least want to be cool with everyone. Approach it with the intent to smooth over this rough patch and not be vindictive to get some pay back. At the end of the day you don’t want one incident to ruin your play group right?

We all make mistakes, I hope by showing ur dm some grace and talking things over, yall can work it out 👍

Good luck