Yes, there's a blockchain better than Bitcoin but you are not asking the right question.
Picture a child today, tomorrow an adult with skills he didn't have when he was younger. One could say he is better than his younger self, also, let's pay attention to the fact that at a young age, there were probably many people considered better than this particular child, why? Because of certain things the others possessed that he did not just as he has skills now as an adult that many other adults don't - and here he would be considered better.
Using this analogy, blockchains are similar to humans, each is unique, good and bad, but each have something unique to themselves, some may call these things "solutions" "unique technologies" or even "utilities", whichever it is, whether centralized or decentralized, each blockchain has something unique to itself, now whether or not this thing is relevant to the current market is a totally different topic on its own.
This is usually the point where most networks experience stagnation because their offerings are not on-demand despite being unique and solving a particular problem.
Understanding this, we can restructure the questions of "what is better" by narrowing it down to different areas of focus.
For example:
Is there any blockchain better than Bitcoin "in terms of security?"
The answer here is debatable, but you'd figure that the greater population would agree that Bitcoin has a sense of superiority when it comes to security, thus, the conclusion would be that there isn't any better blockchain than it in terms of security.
Notwithstanding, when specific fields are considered or given room as a focus, we also discover that Bitcoin is indeed "old tech" and far behind. There are numerous blockchains better than Bitcoin when considering numerous things including scalability, flexibility, compatibility, interoperability, cost, efficiency, and the list continues.
We are on the verge of a massive technologically restructuring of the finance, business and governance ecosystem. Fintech is getting an upgrade and traditional finance is being revolutionized. Businesses are close to easily accessing global markets via the borderless designs of crypto assets and blockchain technology for data storage and processing.
Governance is also close to being revamped to combat heavily concentrated flaws that hurt the systems around the world. This entails that so much will need to be developed so it won't be long before bitcoin becomes the asset for the old just looking to hedge their wealth as with gold today because the network has practically made it clear that expanding to what would allow the protocol handle vast amount of activities is something they do not intend to do.
Which is cool in itself, the cost of this however is losing out on the technological advancements that are about to take place.
I do not expect people to still keep asking these questions of what is better than what in general terms, there is never the "best in all things" such a thing creates imbalance and literally would make the cryptocurrency ecosystem become what it is fighting against "a centralized shithole."
Having diverse blockchains popping up daily is also a sign of decentralization, this is how value is spread. With the building of bridges and deployment of interoperable blockchain and protocol softwares, despite being a space with numerous stand alone blockchains, the will be a lot of cross-chain value flow, this is how the system will ultimately be able to balance the continual practice to maintain decentralization and fair value distribution.