Hello Brother, that's not true, it is not the lowest cost carrier, your customers friends are getting a good pricing because Yellow is the best positioned geographically to their business, low cost to get their freight and a lane of service. Miserable employees? , I don't think so... current employees do a fair share of work and overall still better than other places.
Damage rate?, all trucking companies have the same problem, it has intensified a little bit for the relatively new members.
Crap equipment?, Not true, a lot of equipment has been replaced with late new trucks, keeping some good old trucks too. Older trailers being recycle at a higher rate and fast.
Bad management?, some maybe, but, have to follow orders from higher up for reasons we don't know. Lousy Technology?, No the best one, but, it does the work.
Pricing is set by the markets environment and customers wishes.
Save your venom and bad wishes for something else.