I‘m sorry but I have to say that this is no good.
Unfortunately, “thought networking” is a buzzword-sounding phrase that doesn‘t really convey what the system does.
But I do regret that they missed the leaders that I knew, leaders who told us when things were tough, and that we‘d have to sacrifice, and that these difficulties might last for a while.
很遗憾地去做 Regret to do
很遗憾于做某事 be sorry to do sth
做某事很难过/遗憾 be sorry to do sth
很遗憾地做 regret to do