Both parties are self-serving.
Both parties have supported the surveillance state.
Both parties ignore their constituents when convenient.
Both parties have promoted legislation that they themselves are exempt from.
"Less bad" is a red herring. What's better, a shit sandwich or a sandwich with 90% less shit in it? Partisans will try to convince you that any sandwich will have shit in it, and their particular sandwich's shit is barely noticeable and actually good for you if you were smart enough to realize it.
But your systemic critique bypasses the obvious point that ideologically, there are great differences between the major American political parties on this issue.
Denouncing the system as "all shit" does nothing to change this fact.