xJx, if it is your contention that Thanos didn't have full control over the IG, then the burden of proof falls to you in order to prove it. Do so if you can or concede the point - Thanos was surpreme save for the "One Who Is Above Gods." And even the Living Tribunal was unsure if he would be able to take the gauntlet from Warlock by force, stating that the battle would lay waste to all realities..
Ion pales in comparison.