Doesn’t help that they have a strong reputation for shite quality. It’s really just numerous layers for most of us:

• Product/brand is tainted (as you say).
• Declining quality of their products.
• Reputation (warranted or not) of many Tesla drivers being clueless idiots behind the wheel.
• Still too many embarrassing Musk fans closely associated with Tesla (related to the first point).
• Prices still too high for many.