My wife frequents chinese parent forums, and according to parents there, study time in a lot of households involve children staring at the ceiling and parents yelling... a lot. The thing, though, is I never hear about the situation improving by yelling more.
My older son had trouble concentrating in the beginning (still does to some extent).
I'd say starting off with overly challenging material is probably going to be counterproductive if you're also simultaneously trying to establish a routine. My daughter started with "draw 5 beans" sort of exercises, and seeing her older brother comply with a routine it was much easier to get her to finish her studies in a timely fashion.
"Helping" too much can also be counter productive. The kid may end up expecting you to be there all the time, when really, half of the point is to develop some self sufficiency.
The feedback cycle structure may also be messed up. It may be that the kid is stuck in a vicious cycle of negative feedback (e.g. "Damn about time you finished your math! Why'd take it so long!"). WRT the anecdotes above, I doubt yelling more will yield different results.
For my kids, math oriented games provided a very different feedback cycle structure than study time (getting answers correct is literally gamified to look like rewards), and this is motivation enough for them to furiously scribble calculations on top of doodles they had carefully colored previously. It also provided a different dynamic where we can casually praise them about their in-game progress, rather than being a strictly a "boring school conversation". Another example: we started to do Monopoly game nights as a pretext to sneak in math into playtime and my son got quite into making sure people got the correct amount of change from the bank. IMHO, incorporating more positivity (real, appropriate positivity) into daily life is important.
Another more subtle and difficult to address problem is general outlook on education. I've heard, for example, my kid's teacher say things to the effect of "oof, it's monday", as if school is a chore. I've also noticed north american media also tends to portray education negatively (e.g. the nerd stereotype, ferris bueller-like tropes, etc). This is very very different from east asian culture, where the general default is that education is very important. I don't know how to fix this, other than try not to engage in negative behavior yourself.