What is your region? Most of the time the website loads very fast here.
https://beta.ninjastic.space/users specifically has no internal calls, so the loading is blazing fast (< 200 ms). Try it and if it's taking a lot of time for you, then it's most likely an issue on your internet provider or network config.
When i touch this link with my android phone then open a page and I have seen the name "Theymos" then I click the name but later, when I clicked on right side icon, I saw the name of the legendary member, but then nothing else worked on my phone. Is this because of a problem with the phone or is there some other problem?