That’s 108 feet of elevation gain by the look of it - but over what distance? There’s no scale. If it is 432 feet that would be an average gradient if 25% and unpleasantly steep. Like some of the gradients in the Lake District - The Struggle perhaps, or Wrynose, but not as steep as sections on Hardknott Pass
If it is 864 feet and by the look of things, that would be nearer the mark, it would be an average 12.5% and while steep, something that I would pedal up daily on my rides around here without getting too worked up about it at all.
If it is longer than that, and my guess is that it is, then the gradient is shallower still and no big deal.
Unless there is something there I’m just not seeing
My guess is whoever told you that doesn’t ride much