User blog comment:AustinDR/Thoughts on Infinity War/@comment-35210311-20180428024225

the one problem is that MCU can not create the same ending the comics did in regards to Thanos, in the comics Thanos did not get defeated by heroes but rather grew bored of being all-powerful and actually gave up his power.. in essence Thanos is a perpetual teenager, a Caligula who seeks power but once he gains it quickly bores and moves onto a new conquest.. these are elements of Thanos that separate him from Darkseid.. Thanos will seek power, then waste it or become deeply bored and decide to abandon his power in favor of the next big plan.. thus heroes rarely defeat Thanos.. usually Thanos defeats himself.

the MCU can't really depict that aspect of Thanos, they have to rely on heroes saving the day and while that is good for general audiences it defeats the purpose of Thanos in many ways.