Secondly, Bitcoin is stagnating technologically, when compared to the alternative cryptocurrencies.
No, that's definitely a false statement. Bitcoin has the most advanced and developed protocol. Most of the shitcoins haven't even patched up the security exploits up until the latest versions. Thirdly as I proved earlier in this post Bitcoin has been losing market share steadily over the last two years, while the altcoin market cap is growing consistently.
That doesn't matter since the market cap of Bitcoin has been growing. It has been the highest it's even been since early 2014. Besides, we all know who's behind the altcoin pumping schemes. Hint: The last name starts with a "V". 
I can give you many examples, and I support all three of the projects I just mentioned, I could go into defending each of them on their merits, but I am busy enough attempting to defend the original principles of Bitcoin here on this forum.
You can say why you like them, or why they may be good but you can't change any of the things that I've said because they're facts. There's no need to sugar-coat it.