No need to be sorry, your game is great and difficulty tuning is always hard (I never got it right). I think that rather than decrease the level difficulty. You can make the jump easier. For example, you can add some coyote time (small time window after falling to jump), and edge grasping if the character falls very near the edge of the platform. There are many other things that can keep the level layout hard but platforming easier. A developer for Dead Cells talked about it in GDC (starts at 12:33):
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Thank you so much for your thorough input! This is actually very good point. Even though I will add the coyote time - there is still some redesign I still think some of the challanges are not designed properly (the elements that should be hard are often easy and the once that are supposed to be easy are just crazy hard) :) I will definitely have a look at the video.