The telehealth stock's prospects look dim.It seems so long ago that Teladoc Health (TDOC 0.71%) was a bit of a market darling. The telemedicine specialist shot to prominence when its services were in high demand -- during the heat of the pandemic -- but it's been pretty much downhill since then.Teladoc's latest financial results did nothing to help, as the company once again disappointed investors (more on that below). Could Teladoc turn things around? Is it worth it to buy the stock at current levels?Telad ...