Painless accounting of capital gains

In the circumstance that your trading activity is complex and spans multiple exchanges, what accounting solution do you use to compute your capital gains?

My situation is:

1. trading spot and futures on Binance
2. taking loans on Binance
3. some spot trading on Kraken

I calculated the CG for fiscal year 2020 by using a custom software, as there was no working solution off the shelf that computed the correct result, because:

1. most off the shelf solutions don't work intraday, or
2. the Binance API / CSV provide ambiguous logs that need external context to become univocal.