It doesn’t actually grow faster than other cryptos,
"Grow" is different than "price rise". Bitcoin growth is a combination of price rise, merchant adoption, network (nodes/miners/etc) growing bigger, institutional investors, ... With that definition the altcoins don't even have growth, they just have pump and dumps.
Comparing it to alts it grows much slower.
True, bitcoin does not get pumped but that also means it does not get dumped. When bitcoin price goes from $1000 to $2000 it remains there and then it goes to $4000 then $10000 then $60000 and then $1000000.
But when an altcoin price goes from $100 to $200 it then falls down to $90 then falls more to $50 then they pump it a little to $60 and eventually it falls to $0.01.
Why is it popular? Well because it was the first
Wrong. There were other attempts before bitcoin to create a similar "currency" and they all failed. Bitcoin succeeded because Satoshi came up with the only working solution that could provide security and decentralization and a lot more.
The reason why nothing has reached bitcoin's success has nothing to do with it being the first, it is all about the fact that to this date we have not seen any serious project that provides any actual utility.
Will another alt exceeds bitcoins market cap? It’s possible however I don’t think it will be anytime soon.
It has happened at least a dozen times in the past. Market cap is a wrong value for cryptocurrencies and it can easily be manipulated to be any number.
Ethereum is close but it has its issues too like Bitcoin,
You are wrong on both accounts.
ETH problems are so much more serious and fundamental and they don't exist in bitcoin.
For example bitcoin has some troubles with its scaling which was already solved by second layer proposal while ETH has serious scaling issues that has led to transaction fees that are 10 times higher than bitcoin's!
Also ETH has fundamental flaws such as centralization and lack of immutability that are essential to any blockchain and other flaws such as the massive premine and on top of all that there are a lot of security flaws in its protocol and to name one: the smart contracts.