I will add a demo system where users can run a node and play. This will be purely for educational purposes so those who for any reason cannot run a node will be able to learn how it works without having to download the entire chain. This will bring bitcoin closer to home and show people that it is not too complicated or at least all of it is not.
The goal will be to encourage more users to take the step and run their own nodes, contributing to how decentralized the network is.

That is what I will do on the side, as the main course, I will create a fully decentralized system that is as immune to regulation as bitcoin is. This will replace other services that are being dominated by centralization like exchanges and mixers. This makes it much easier to stay private and not have to choose between decentralization and efficient service.

I know this is not adding anything to Bitcoin directly, but that is because there is mighty little one can add, all we are left with is to create efficient, censorship resistant channels and we are not doing so well now.

Well, like you said, let's assume a magic happens today and I became a developer which is going to last only for a few hours or minutes, then I would first of, create a decentralization blockchain platform that can allow every Bitcoiner from every part of the world to freely and easily buy and sell Bitcoin without going through KYC procedures. Secondly, I will remove Bitcoin from every centralized exchange if that's possible to do, then allow btc to be traded only on the DEX or other DEX.

Let's all pretend to be a developer for today, and I have a question for you all.

If you are to add 1 thing to Bitcoin what will it be? And also if you are to remove just one thing from Bitcoin what will it be?

Would be adding the Mimblewimble look alike protocol to increase user privacy, but I doubt if the community would even approve   . As for the remover, would be wiping out ordinals and anything that relates to it. Tired of experiencing regular high TX fee caused by congestion.

If I were a developer, I don't want to add or remove something from what its already work because perhaps that can influence or impact the other things that I don't knows.

People already satisfy with all of the things from Bitcoin and even if there is a bug or something, the other developer will fix it. 

Perhaps if someone wants to separate something from Bitcoin because he knows a thing that can be a new coin, that will be different. But that will needs more skills to follows what it is already runs and most people doesn't knows about it.

Absolutely all we can do is complain. We have no actual ability to solve these problems ourselves. It’s probably difficult to find ways to do what we ask for without compromising other features of bitcoin. Most especially its security. If making a solution so that transactions fees wouldn’t be so high anymore would require for bitcoin’s security and decentralization to be sacrificed then a lot more issues would come up.

Just hoping that one day we actually get some good balance between the two issues.

As much as we can see some flaws of bitcoin, I’m sure the developers themselves are also addressing the problem as well but the fact that until now it’s still not settled, then most likely there could be some barriers that block them from doing it. Whatever it is, it’s only them that can relate.

Bitcoin is currently good but I know there are still more to it that needs improvement. And the good thing is, at the end of the day, only us the bitcoin enthusiasts, investors and traders will be the one to benefit it the most.