With all the same strengths, weaknesses, and quirks. “All politicians are the same” would make senators Joseph McCarthy (anti-communism crusader) and Bernie Sanders (an actual socialist) the same. You can see how easily this view breaks down.
The process for political change
1: Advocate for the least worst options at the city, county, state, and national level, even if that means convincing someone you like to run and helping them get on the ballot
2: Vote for the least worst options at all levels
3: Watch as the least worst option gets a little better with each cycle
This has been broken for the last 40 years or so because people keep saying “bluh bluh, all politicians are the same” instead of working to change things. It will only get worse if you refuse to take action.