I wouldn't say all altcoins have an actual utility as you say, but many of them or several of them at least, are currently more useful than Bitcoin for the main current use cases of the blockchain technology : Web3, DeFi, GameFi, DAO, NFT, smart contracts, dApps, tokens, obfuscation, instant payments/transactions, cheap ones,... It's sad but currently BTC is almost useless for me because of its very high fees and the lack of adoption of the Lightening Network by merchants and platforms.
Bitcoin is almost useless for you? Why not tell your campaign manager not to pay you in bitcoin because it is not useful for you.
Altcoins are useful than bitcoin? Becuase the fall under DeFi, NFT, Web3, smart contract, dApps, tokens, instant payment/transactions, cheap ones? Are you serious. Most of what you listed are what scammers and hackers are using to make money and the recent advanced ponzi scheme are becuase of that
The only point you have is transaction fee. Then do not use bitcoin.
When it comes to utility, bitcoin is far useful. But when it comes to scam and hack, altcoins are mostly useful for scammers.
For fee, you can use lightning network.
Bitcoin is useful to the extent that you can use those altcoins, side chains instead. They are not bitcoin but they developers have bitcoin that they bought and pegged with it.
What about Ordinals and Inscriptions? They are also not done by bitcoin developers but that is part of the usefulness of bitcoin blockchain.
What I see about you is that you are not happy with how the transaction fee is, but bitcoin is far more useful for me. It also has the highest secure blockchain.
Bitcoin is accepted as a legal tender in El Salvador and CAR.