Doran’s end game was terrible in the books too. Wait until everyone who wronged you was already dead, then get revenge. “Fire and blood!”
You’re right - it was a terrible plan. Plan A depended on Viserys not mouthing off to Kahl Drago and getting himself killed in the process; Plan B depended on Quentyn Martell not attempting to steal one of Dany’s dragons and getting eaten in the process. But as bad as the plan was, at least book Doran had a plan. What was show Doran’s plan? Brood in his wheelchair the rest of his life and do nothing so the Lannisters don’t invade Dorne and assume nobody in Dorne, especially the Sand Snakes, don’t turn on him? How’d that strategy work out?