Season 1 was great.
Season 2 was okay till halfway through.
Season 3 and other half of season 2 bored me to death.
Honestly, I wish they used the capitol bombing as the main plot of the story. It's called the Designated Survivor after all so it just makes sense to include all the stories under Kirkman's administration. The story became more inclined to the effects of politics to a virtuous man. Maybe it's just not for me. I also didn't appreciate how they removed so many great characters from season 3 and added lots of unnecessary ones. It contributed to my loss of interest. Still worth trying tho if you're into politics and some action. But personally, I prefer they just prolonged the story about the bombing, less politics and more action.