Our spider got a headstart in exp for sure, though it was hell. That said, look at Sophia's fucking starting skill points. 75000 to kumoko's 100, and some humans in the LN got 100k. She could buy up a few skills to start with and do the same grind once she learns how to walk. How many crazy skills did Kumoko get for 100 points like the evil eyes?
One explanation I can think of for why Kumoko gets no points is the stuff she can do with the webs. The skills are all combat based but she could theoretically make shirts and pump them full of magic like special armor. It's like spiders get inherent crafting abilities and humans can't even unlock a smithing skill.