I worked for an employer with just such a captain. In fact, I had him just after completing OE. This captain was known to everyone, yet inexplicably continued in his position.
I approached a standards captain about the matter, and was asked to write an informal report. The same standards captain conducted a survey of others with the same response. At some point in the near future, the problem captain was downgraded after caught engaging in his behaviors, by an offline pilot.
Every company seems to have one or two. I knew one who had to take anger management classes, and I've no idea how he kept his position, but he did.
Do what you can, decide that you won't be that kind of captain when you upgrade, and try to minimize being around this guy. Share your concerns privately (but not with him). If it's too objectionable, move on. I have, and it was worth it.