New challenges bad?

Is it just me or does anyone else find these new weekly  speed lines overly difficult and highly annoying? I by no means am bad at the game and can appreciate retrying a speed line 10-15times but after that I start to think it is no longer a skill issue and that the speed lines are just difficult to complete because the game won’t allow it. I’ve been trying to grind this bus on “uphill battle” and can’t get it to work before collecting the last bearing. Idk if it’s just because I hate the speed line challenges in general but I think they’re bad through and through.