S2E8 is arguably the best episode in the series, so at least get through that. S3 is rough. You can see what they were trying to do, but they failed in the end

S2E8 is arguably the best episode in the series, so at least get through that. S3 is rough. You can see what they were trying to do, but they failed in the end. I wouldn't say it isn't worth watching, just know it's a steep decline in quality. I quite enjoyed S4 and thought it was a return to form. It wasn't quite S1 levels of good, but it was a marked improvement over both S2 and especially S3. The finale was a little disappointing, but they clearly knew cancellation was a possibility and wrote it in a way that the story could be considered complete after S4 while also leaving it open for a final S5. So no real cliffhanger, at least.