There are advantages and disadvantages to all systems.

In European PR systems where many parties routinely end up in parliament, the real governing is done by elites stiching up a deal between themselves and all the proportinal voting just slightly alters the barganing chips brought to the table.

The biggest case of this is Germany, which will be ruled by the grand-coalition for the forseeable future, more or less regardless of what happens at elections.

This has worked OK in countries where people mostly trust their elites. But it is still not particularly democratic.