Tesla sales declined 13% in Q1, indicating struggles in attracting buyers.Possible factors contributing to the decline include an ageing lineup, competition from rivals, and backlash against Elon Musk's rightwing politics.Tesla reported 336,681 vehicle deliveries in Q1, lower than the expected 408,000 and down from 387,000 in the same period last year.Tesla's stock has dropped significantly, and it has lost market share to rivals, such as BYD, due to improvements in their offerings.