Traders online are not impressed by Elon Musk's planned return to Tesla.Retail investors believe the brand damage might be irreversible, and Musk's focus on politics has caused distractions for the company.Despite Musk's return, investors don't expect a significant impact on Tesla's underwhelming Q1 earnings and the reputational damage.Some investors suggest Musk needs to concentrate on fixing Tesla's fundamentals and address the significant brand damage caused by his politics.