It's not unreasonable to expect that, but considering the resources available to the staff in many care homes, it is unrealistic unfortunately.
The last place I worked in care was a 'specialised' dementia unit with 20 residents, with needs ranging from fully mobile but needing the assistance of one person to complete personal care through to fully bed bound and needing everything done for them, around 10 residents needed the use of equipment that needed two care staff to move around.
There were medication rounds to complete (time consuming when you are needing to talk/persuade people to take their medication or have to hide it in food or drinks (as directed by GP/other professionals) and observe until it's gone) and not make people feel like they're just having pills shoved under their nose and then done, and a specified amount of time between certain medications - and the need to ensure pain relief is delivered correctly and on time.
Four people on average needing feeding all meals and drinks and everything but lunch (main meal) was prepared and given out by care staff.
At least one person on EOL at any one time.
Phone ringing.
Relatives wanting to be in/out or talk to you.
Dr & nurses visits to assist with.
And there were 4 care staff. Four of us for 20 people with complex needs. The CQC didn't have an issue with the resident/staff ratio, nor the local council. And on average we'd run at least one shift a week short staffed.
At night there were 2 care staff, because despite it being well known (and something I was trained to understand!!!) that people with dementia have disturbed sleeping patterns, apparently no more staff were needed because 'everyone is asleep'.
It's just not physically possible to give even a basic level of care in a timely manner to 20 people between 4 people, let alone 2, especially when one is on a meds round and two are needed to transfer half the residents.
So no, it's not unreasonable to expect a basic level of care, but it's unrealistic to expect it when resources (that are generally controlled by people interested in profit) are not there.
And while care staff are scapegoated and blamed for poor care rather than a system that is there for profit, nothing will change, nor did it in the years I worked in care.
I loved the actual job, but I came across a phrase (on here I think) that perfectly described my 'burn out' - moral injury - I was under constant stress and anxiety because it didn't matter how much I cared, or what I wanted to do, or how much I knew what needed doing, I physically couldn't do it all and I felt horrendously guilty about that.
I left for hospitality because although you may not get treated any better, I'm not at risk of a safeguarding for being physically unable to be in 3 places at once. And I get paid marginally more and can afford to pay bills and have my heating on now and again.