You get acquihires when the assumptions behind the company's business model have been proven false and there's basically no way to solve it other than rebooting the company. Arguably this is an argument to not take VC until you've got the hockey-stick trajectory, so you can pivot & reboot at will without dissolving an existing organization. But even this sucks for customers, if you have any.
Doesn't that make them bad though? I mean it's like saying "It's not that the mafia are bad people who want to screw over people, but their business model requires them to blackmail and occasionally kill" (not comparing levels of "badness" of course, merely showing the problem in said reasoning).
It's not like following a particular "business model" is not a decision people get to make. And if people take the VC model that favours acquihires, then they very much have decided to do stuff that screws with users.
And many times, there's no other exit option for the VCs. Does it suck for users? Absolutely - which is why companies often have lots of apprehension about being early adopters of a startup's technology. It's why B2B startups are really hard, and why they tend not to hockey-stick because the customer acquisition costs are high and don't shrink with scale.
It's up to the founders to convince their VCs to pass on the acquihire because they think the company still has hockey-stick potential. Zuckerberg did this a number of times - it was still really arrogant, but it paid off for Facebook and shows why founders need a bit of arrogance to be successful. It's a lot harder to do this if you're running a startup that doesn't have a lot of market traction.