From killing characters who had so many episodes that promised development and an onward arc, to simply killing others in the background in such a way that they could have been entirely missed, TWD's kill streak had some lacking entries. The show also had certain actors who left or were written out of the story prematurely compared to comic counterparts, which was also a disappointment for fans of the comics that inspired the show. However, some deaths were considerably worse than others.
10 Laura
9 Alden
Alden similarly had his start in the Saviors camp. However, he quickly left the former group in order to support those at the Hilltop, where he began building a life and family for himself. He became a respected member of the community, and eventually became a close ally of Maggie's in Alexandria.
8 Dale
Dale was one of the original characters in TWD. A member of the group since Atlanta, and the voice of reason and morality when everyone was on the brink of crossing the line. In the comics, he survives for far longer than his TV counterpart, and he plays a role that is similar to Hershel's during season 2 and 3, where he helps to keep the group in tune with their own humanity.
7 Andrea
She is tied up and trapped by the Governor in a small room with Milton, another person who betrayed the Governor. Milton is initially told to kill Andrea if he wishes to leave alive, but he turns a knife on the governor only to be killed. Then, his body is left in the room with Andrea to turn and eventually kill her. However, there appears to be a long time between Milton's death and his transformation. Despite this, the moment when Andrea vigorously tries to escape and breaks her bonds is as Milton's zombified body approaches, which frees her just in time... to be bitten.
6 Sasha
5 Isabelle
Isabelle was one of the primary characters in the TWD spin-off, Daryl Dixon. She was invaluable as an ally to Daryl, and helped to protect and raise Laurent for over a decade. However, despite her central role, and her longevity after the apocalypse occurred, her end was sharp and in some ways lacking.
4 Beta
Beta, as the name suggests, was the number two in command of the Whisperers. He was a huge hulking figure, who constantly wore a Walker skin mask to conceal his identity and blend in with the dead. However, he also appears to be unstable, viewing himself as one of the walkers despite being alive. After causing a lot of trouble, Beta is put down with relative ease.
3 Tyreese
Regardless of his hopes and intentions, Tyreese suffered a sad fate when he was bitten on the arm by a Walker. While amputating the infected flesh could prevent the spread, the group was slow to act, and Tyreese hesitated to proceed. After a considerable wait, his arm was chopped of, but by then, it was too late, and the infection had spread further. In addition, he lost blood to the point of almost dying. Michonne then had to sacrifice him before he could reanimate, but overall, it was a disappointing end for a character with a lot of potential.
2 Beth
1 Carl
It's clear who lands the first place spot for most disappointing death on the show, because it literally marked a turning point where the show started to really go downhill. Rick's son, Carl, had been set up from the very beginning to be the best of the next generation. Growing up in an apocalypse, he was a tough kid, but he also cared deeply about others, and he had a lot to live for with a family consisting of his step-mother, Michonne, his father, and his baby sister, Judith.