Honestly it’s both. There’s shitty infrastructure combined with 2-ton passenger trucks. But you also have a society that while creating bike lanes, doesn’t create cyclists. Instead I see motorcycles driving down the bike lane, cyclists going against traffic, scooters cutting through shit like the end of world is behind them.
Really no one person is wrong, we’re kinda all wrong for not getting fucking organized.
The street doesn’t belong to anyone, it’s there to efficiently move as many people as possible, as safely as possible. That requires everyone to participate though.