10% isn't steep! I'm not very fit but I can (just!) get up a few hundred metres of 10% on the 52/19 gear on my singlespeed bike.
I recently added a second gear option to that bike - 42/29. That is okay for a few hundred metres at 15%.
I have a 42/42 bottom gear on the bike I keep in Devon. I have used that for 20% climbs but anything steeper than that is pretty hard.
My lowest gear on my best bike up here is 28/30. On a good day I can just about get up 25% on that.
When I first got back into cycling up here in Yorkshire 33 years ago, the steep local hills half killed me. I had a 42/28 bottom gear then, which I soon switched to a 39/28 but even that was hard work. The thing is, I was not only unfit, I was also obese. Big rolls of fat don't help when trying to ride up big hills.
Quite possibly!
How tall are you and what do you weigh? How long have you been cycling?