2 Different Fics...
I am looking for specific fics that I read once on AO3 but haven't been able to find since!
One was a fic where Steve was de-serumed somehow and is very mad and negative in general about the change. Bucky is getting treatment and seeing a psychologist and does not appreciate Steve's negativity. I think he cuts him out at some point to take care of himself.
The other was a fic where Peter encounters each of the Avengers out of costume at different times where he is contemplating or planning suicide. They all talk him out of it and later when he shows up at a meeting they are really happy to see that he is ok.