Tesla is facing a significant sales slump across multiple regions, including the US, UK, Europe, and New Zealand, with inventory piling up due to poor sales. Additionally, Tesla's stock has been negatively impacted by Chinese competition, lack of new models, and Elon Musk's political involvement. The company is also experiencing backlash in the UK linked to a boycott over Musk's political stances, leading to a 62% drop in sales there. Furthermore, Tesla is facing competition from 'Tesla EV Motors' in Texas, which aims to build 'the people's car' in America.