We are not race drivers, we are just fans. We don't study the rule book or anything, we just watch the race weekend.
The drivers do understand the rules, but each team actually has someone on staff to study the rules of the formula to look for loopholes and to make sure the team isn't breaking the rules in some way.
The rules for overtaking are complicated, probably more complicated than we all realise.
This is the pinnacle of motor racing, everyone has a favourite team or driver and they don't want to see them treated unfairly. Go back a few decades and you will see the same thing.... I'm not sure what you were expecting.