I agree it's very unlikely that sabotage is what's going on, but what you're saying is the one compelling argument in favor of sabotage. "Everyone but that one actor has very bad luck" is exactly what sabotage looks like.

Except that actor has the most advanced space program in history. Its like saying Michael Phelps is part of a conspiracy to keep other swimmers from winning. Uh no. The world isn't one on even playing field. Some people are better than others and thus get better results.

Time to spin it the other way: the only reason the US landings on Mars are successful is because of secret government technology developed out of a covertly funded program from the 1950s as part of antigravity research.