Correct, gain/loss net of fees, just like stock transactions.

Practically all of the ones I've seen have been a mess.  I know several preparers who push this back on the client to use a service such as Koinly to summarize all of this and just use their 8949s.  That's probably not a bad idea.

I've also heard in CPE that if the cryptocurrency is spent for personal use (i.e. Starbucks) any loss is a non-deductible personal loss.  I'm not sure I agree with this but it hasn't come up in practice.  My clients just buy/sell (or mine/sell).