That doesn't happen to me at stores.
If it's something that is genuinely too heavy for me, I don't mind.
What I hate is how, at my work, where everyone is female, they all insist on helping me to lift things that I can lift easily. Or rather, things that I could lift easily if I were permitted to lift them square, but which are uncomfortably heavy to lift while leaning slightly sideways, as I must do to lift them cheek-to-jowel with a partner. This is especially annoying considering that my 'Ant Strength' (I am tiny, I am strong) is now well-known there since half the crew once watched me (quickly, before they could offer to help) chuck 80-some pounds into a chest freezer.