NON profit health organization

So being the only IT person on staff covering 4 locations , I’m also getting thrown into project out of my scope . Because I’m “IT” I’m now the heating and air conditioning guy .. the thing is nobody has even trained me on any of this and even when following directions something is always not working properly. . it’s almost as if they just throw you into these projects knowing damn well there’s issue with something. . . Instead of hiring someone that is professional trained in it they want me to figure it out . With no training .. so pretty much test it and figure shit out and on top of that I think almost everything here doesn’t work like it’s supposed to something wrong something breaks etc … then I got put into this other thing where doctors were having issues with iPad we pay another company Voyce which control these MDM’s and then the doctors are yelling at me when it’s not working anymore even though it’s not my responsibility but I’m “ IT” so I got to fix it .. then I call all these company that we pay and there is 0 support team , just voice mails and nobody answers .. also my ceo is very cheap it’s almost you get what you pay for service and when something breaks everything comes to me .. like damn .. nobody also knows anything about anything no communication just throw u in and figure it out. . how did you guys deal with this .