I think you're overthinking it. Hybrid cars are not bad, they are pretty cool. It's a matter of semantics. A hydrogen fuel cell car could be considered a hybrid because the primary source of energy, hydrogen, is converted into energy and stored into an electric battery, which powers the drivetrain. Zero emissions, no internal combustion engine, hydrogen-electric hybrid.

Tesla is pure electric. You charge the battery itself, directly.

That sounds like a series hybrid; when people say electric they mean battery electric. The point is moot since hydrogen is pointless.