That's how I was when I was a new aide, so slow because I was trying to do everything the right way. The sad reality of nursing homes... they're understaffed, and you can only get the bare minimum done.
Perhaps as an lpn, you could help out with some of that. I worked with a nurse who loved to do the "little things" like brushing their hair, applying lotion, helping them with their fancier clothes that take so long to put on, painting their fingernails, brushing their teeth... it made life better for the residents and helped the CNAs too. It's just plain impossible for one aide to do everything like that for 20+ residents.