He is a man who owns an electric car company but has been pushing climate change denialism as his political position and supporting politicians who do.
There's competition because Tesla is not the dominant prime mover it's valuation implies it should be, and people have sensed - correctly - a market opening. No one I know recommends "buy a Tesla" anymore for your first electric car - they say buy a Hydundai Ioniq or wait for a Chinese brand to get cheaper.
People are actively embarrassed to drive Teslas, which in turn means there's a growing market for "anything but a Tesla...". And because of that all of the actual faults of a Tesla are paid that much more scrutiny.