Euthanasia

Is it too much to expect an appointment time? Six years ago when I had to have a Cat euthanised who was very ill and in retrospect, I should’ve let him die on his own because he was very close to dying. I had to wait that excruciating two hours in that window they give you not knowing when the person would arrive and here he is dying on my lap. I don’t wanna go through that again yet. I’m now faced with a 19 year-old cat who’s on our way out and I need to have that service, but I can’t find one that would make an actual appointment for me. I keep wanting it to be very personalised and it really just isn’t.