system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU/What If] How in God's name...

...was Ultron able to kill Thanos so easily when it took a literal galaxy-wide army to defeat him, and even then it was only by the skin of their teeth?

(Spoiler mark just in case)
gpt
It didn't take a galaxy-wide army to defeat Thanos, it took an army to defeat Thanos's army. Wanda was about to kill Thanos by herself. Steve, Tony, Thor, Wanda, and Captain Marvel were the only ones who fought Thanos directly.

Thanos is still a flesh and blood organic being, an Infinity Stone laser will fuck him up like any other.