Having issues while making animation

I was trying to create an animation in Adobe Animate, but I having trouble getting my drawings to look smooth and consistent. I tried using the brush tool, but the lines keep appearing jagged and rough, making your animation look unprofessional.

I also noticed that the software is running slower than usual, and I experiencing frequent crashes and freezing while working on my project. This is causing frustration and delays in my work, as I am unable to complete the animation on time. Creating for [URL removed by Moderator].