Going through a hard time need to vent but open to advice

Hello I'm new here, I hope this is the right place to post. My parter has cptsd and has been going through a very rough time. The past 4 days have been nothing but them being in crisis all day including moments where they're mean to me. They then realize that is not me who they're angry to but really all the trauma showing up and feel a lot of guilt about it. I love them so much and I hate seeing them suffer like this and I've been trying to set boundaries about the mistreatment but I have a hard time about it and I'm scared they will hurt themself . I'm also incredibly frustrated because we are poor and for the past year have been doing a big effort to pay for therapy but recently both they're psychologist and psychiatrist basically abandoned them (because they work online and allegedly they need in person therapy) and we been trying to get new treatment but haven't been able to get ir yet. We don't have a lot of people to count on and I feel so lonley and tired. They're best friend who Is sometimes a big support also has cptsd and os also having a big crisis and is being really mean to both of us so she and my partner had a big fight and that made things worse. I guess I'm mostly looking to vent and maybe get some advice on how to handle big crisis, especially anger management.