I remember you posted a sketch thread some time back.
I looked at it again just now and honestly, I think you are being too hard on yourself regarding your sketching abillities.
Others might disagree but for me your level is more than sufficient.
What is on the other hand really important to me when I recommend people to be hired, is whether they have a unique style and a story to tell in their projects.
I have seen great sketchers being passed on because their work just had no point of view.
So my advice would be to make sure your portfolio is laid out well and has soul. Not just hot, random sketches.
You apply what you can do today to some interesting, well researched and developed projects and I see no reason why you wouldn’t land a job in ID.