Most VCs go in with a go-big-or-go-broke mentality. The entire calculation is to get a couple 10x-100x exits to offset all the failed attempts. Leveling off after a series C to "just" a profitable company makes business sense for the company and founders. But if you do that the series B and series C investors can't get their big exit, so they will do whatever they can to prevent that.

The best way out once you're in this deep is probably an IPO. The investors get their exit, and you're now "only" beholden to shareholders, who are more used to sustainable businesses that can survive decades or centuries.