Yes, the system is rigged.
Not against Trump, specifically. But the system is rigged. The only people who don’t (or pretend to not) recognise it are the hacks who benefit from it.
The whole purpose of having a system is to rig it.
Wealth controls power and always will
Both parties rig their systems.
The Democrats ‘superdelegates’ are a hedge against anyone who doesn’t follow the Uniparty line of talking Progressive and keeping the Crony Capitalists happy in the end.
The Republicans come up with a more complex system of allocating delegates that creates winner take all systems in some liberal states with the more conservative ones turned into proportional schemes.
In addition, the allocation of delegates in primaries is not related to the actual people selected. They get selected at party meetings where the insiders have control.
Here in PA the system separates most delegates from the popular vote with a separate election and only names on the ballot, no candidates linked to the names.
Local Republican elected officials who are the Establishment have the best name recognition on the lists of candidates and have often won most slots leaving folks like Ronald Reagan with only 10 percent of our state’s delegates in 1976 and 1980.
How is the system ‘rigged?’
The system is not rigged. Sometimes the people who are willing to go to caucuses and do the work come out with more delegates than people who are lazy and clueless.