D's need to figure out effective ways to counter the Republican bad actors, but no strategy is ever going to be enough, with a full blown authoritarian party in a 2 party system and massive propaganda ecosystem absolutely dominates the media and has thoroughly cooked millions of brains.
There's just no way to overcome all that every time, at the candidate level.
The right-wing propaganda machine, from Fox to Nick Fuentes to Joe Rogan - even to Twitter - has to be effectively dismantled or countered.