Originally Posted by
M1982
IMHO they had no consistent level that Thanos was at. Like so many comic characters he was always "as strong as the story needs him to be right now, no matter how much that clashed with previous portrayals".
Gamora found it totally plausible that her spear stab would kill him. Nebula believed her mission to kill Thanos not only to be possible, by his own words she indeed nearly succeeded before being overwhelmed and captured.
So he's either some godlike titan or just a tough big mortal guy, whatever the story needs him to be right now.