Age of Ultron was her at her literal weakest we've seen, her telepathy has been improved upon several times over. She couldn't even use telepathy at a distance and had to walk right up her opponent, where as now she's using telepathy at a town wide scale subconsciously and with a wave of her finger can control multiple soldiers... again while still manipulating a town.
AOU has her 2nd best mind hex feat where she compells entire buildings of Sokovians to evacuate the city. Her best one would be the WandaVision series.
Wanda still overpowered Thanos, who overpowered Thor
She used her telekinesis to hurt him / restrain him. MCU Thanos without the Infinity Gauntlet literally has no ranged capacity beyond throwing his double sided glaive at her. Endgame Thor is also a lot weaker than he normally is to boot, namely why he went from one-shotting Thanos with the IG to nearly being killed by his own weapon fighting Thanos without the IG.