DCA & fees - am I an idiot?

2-3 years ago I started purchasing btc. I purchase small amounts via direct deposit to Strike every time I get paid. I then transfer them to my ledger cold wallet. It seems like over last few months, for each transfer the 'network fees' showing in Ledger for the txn is crazy high, like 15% of the transfer amount. Is this normal, or am I doing something wrong/not optimal? Is there a way to reduce these fees using these same systems (Strike+Ledger)? Full disclosure, I view BTC as a portion of my investment portfolio. I wouldn't buy a Vanguard ETF with a 15% txn fee, for example. Obv BTC is different with different growth potential but that's the context I'm coming from. Thanks for any guidance anyone can provide, don't know anyone IRL who is familiar with this.