I can feel you but sometimes, sketches would probably make it seem like the character could barely stand but yeah I get it when the lineart feels more wobbly than the sketch. Though I could say that the lineart doesn't look so wobbly! I think the lines are odd, but just a bit of coloring and a bit of tweaking (e.g. clipping layers), I think it may make linearting fun!
In my opinion, it's a matter of taste, knowing whether lineart is worth it or not depends on the style of coloring you aim for! That's just for me but sometimes, when I left my sketch alone, it blended well with rough coloring as long as I color the sketch as well by clipping the sketch layer. I lineart in most cases though due to my anime art style and my kinda solid shading since I'm not really that much into painting. Sometimes though, I still leave the sketch layer alone, but I just clean it up to make it seem like lineart. Sometimes, I just don't sketch at all and straight up to lineart. Well, it mostly just crosses to my mind on how I'll handle my lineart in my artwork nowadays so I'm really sorry if that sounded really vague ^^;
Basically, lineart would always seem unsatisfactory at first, but handling it by coloring it, in my case, kind of hides the flaw I have with linearting. It started to make me less worried about how will my lineart end up!
Just a few questions though, have you tired changing your min brush size or the stabilizer? It helps me a lot to keep a more stable lineart!