As a Switch Pro owner (calling it a "Switch 2" is disingenuous on what a "next generation system" is), I side with the complainers. MKW has essentially three play styles:
1. Lap Courses - These are the classic lap courses everyone is familiar with with involve a great deal of tricks, obstacles, shortcuts, drifting spots, and and your typical racing "mental engagement." If you know Mario Kart then you know these courses.
2. Drag Strips - Generally straight line races with little variation littered with boost pads and non-racer traffic. Nintendo attempted to spice it up by tossing a few things here-and-there to spice the races up (power lines and walls to drive on, trucks and boats to drive into to temporarily control, etc.), but ultimately these races are mind-numbingly boring af.
3. Open World - Accessed from the title screen directly...you just drive around looking for randumb challenges to complete that teach new players how to perform some of the stunts "Power Pro Players" use, ? blocks to activate, and costumes to unlock. It is bloody boring, even for a single player experience, as there is no racing, no battles, etc. You...just drive. That's it. That's the mode.
The lap courses are fun, engaging, classic, and challenging as you jockey for position while item-wheeling from mid-pack to snatch victory from that guy up-front who seems to ninja-dodge everything chucked at them. Classic mode with classic strengths & weaknesses.
The drag strips are bloody boring that almost no-one enjoys racing on. There's no variation, there's no excitement, and it suffers the exact same faults of the classic courses with absolutely none of the benefits. These are a downgrade and mockery of previous non-lap courses like "Mount Wario". It's the video game equivalent of driving the interstate through Kansas:
Now, if you were paying for the Nintendo Online to play Mario Kart online...what do you want to race on: Sunshine Airport? Or Kansas? That's why they're pissed - no-one wants to play the boring crap any more than they absolutely must. The "drag strips" are
the racing equivalent of grinding in a JRPG. Enter "drag" jokes here.