Yeah, well... It's not like you're born with it.
Practice makes perfect. Literally. My first 2 maps weren't even timed. I set no offset or BPM. I timed each individual note manually because I didn't know what the hell I was doing.
After making about 15 maps, I leveled up and am where I am now.
Just takes practice man. And patience. You gotta WANT to map. If you enjoy doing it, you'll get better.