Here’s some links directly from the unions thanking Biden for working with the unions after the strike was blocked to get them what they wanted.
http://ibew.net/media-center/Articles/22Daily/2208/220917_thanks
https://ky.aflcio.org/news/we-never-stopped-applying-pressure-hard-fought-success-rail-sick-days
Look I’m not a Biden fan, I think there’s plenty to criticize him for and I would vastly prefer Bernie for president. But critiquing him on this when he got the workers what they wanted while also avoiding a strike which would have negative impacts both to workers and other people sounds like a win win to me and exactly what the president should be doing. Yeah I definitely think going the route of not allowing them to strike is definitely not the best but he did follow through to get them what they wanted. Strikes should be a last resort if a company won’t give the workers what they want and if the president can step in and get them what they want without a strike that’s generally a good thing.