Fees are typically written off (or offset), but it’s more than likely that you realized gains in paying those fees, so it can end up being a net-gain, instead of a net-loss.
fees.wtf add up your entire fee history, and tell you the market value of today, not when you paid each fee, so it’s not a good tool for that.
If you’re not using crypto tax tracking software, I recommend CoinTracking or Koinly. You can link your public wallet address and they do the hard work for you. Can also use exchange APIs too. Will likely need manual cleanup of some odd coins, but overall they’re worth the initial setup time. Once setup, it auto-syncs so you don’t have to worry about it. Both are also good for tracking your portfolio (CoinTracking is better in that regard), but both rely on coins being listing in CMC or WCI. Not sure of a crypto tax software that uses CoinGecko and gives a nice portfolio tracker too.