There are a few reasons why you may be experiencing high network fees:
- Spike in network activity
- Your trying to execute a more complex transaction
- High interest in the network
Spike In Network Activity
Depending on the time of day or possible events such as popular NFT mints or DeFi events, there can be a surge of users trying to process transactions at the same time causing the gas fee market to increase.
Your Trying to Execute a Complex Transaction
When processing a simply transactions such as sending ETH from wallet to another, you may notice the gas fees will be less than when completing a transaction such as a swap on DEX. This type of transaction is considered complex since you are interacting with a smart contract, which in general will require more processing power resulting in higher gas fees.