It's understandable that you feel confused and upset by your "baptism by fire" into the nurse home business. Being a new grad and getting thrown into a situation that is nothing like what they told you it would be like in nursing school sucks. However, it's the reality for most new grads.
Now before you quit, do you have another job lined up? Are there a lot of opportunities for LPNs outside of LTC/SNF in your region? If there are tons of LPN jobs that require no experience (and are not in a nursing home) in your state then by all means quit.
If not then think really hard before you quit because the conditions you describe at your facility are the norm not the exception. Very few LTC/SNF will give you more than a few weeks orientation and most will give a new grad a few days. In addition to that, the ratio you described is not that bad. I was a new grad LPN thrown into an LTC/SNF position on 3-11pm with 40 patients, I was the only nurse, yes the acuity was just as bad as what you are describing. I had tons of pre-dinner and pre-HS fingersticks with coverage, 8 tube feeds, and two trach patients. This was in addition to people coming in for rehab and we had a bootleg hospice going on etc...etc. I would set up a CPM for the post knee repalcement and then I would run down the hall to give Roxanol to my dying cancer patient...then I would run to suction and give a nebulizer treatment to my trach patient and of course pharmacy would be calling and so and so's family member needed to complain to me right now. This was all the in-between stuff aside from the regular duties of med pass and wound care, IVs...central lines (which I wasn't even supposed to touch ), calling the MD for orders or to report labs...the demented sun-downers...the geri-psych schizophrenic patient who says he is "Tony the Umbrella Man" and he is going to kick my a** lol. Never mind patients returning from hospital or needing to go out...falls...CNA conflicts and insubordination....etc. It never ended.
I looked at it as a stepping stone to something better. I stuck it out for two years while I was getting my RN and I never looked back. That miserable job helped me develop time/people management skills as well as gain exposure to numerous medical conditions that I never dealt with during clinicals.
Apply to every non-LTC/SNF job you can even if you don't qualify for the position but don't quit this job(unless you got it like that financially). It's easier to find something when you already have a job and the longer you do this the better you will become at prioritizing.
I wish you luck with your new career!