I just discovered tubitv.com. last night it worked great but today it takes forever after I click on anything (including search, categories or a video) like the whole site is dragging. Whats causing this?

It sounds like a networking issue if search is also having trouble.
It may be useful to check the network functioning.
Very basic tests in the terminal include:
ip a - check that the networking interface, ethernet or wifi, shows "state UP"
ping -c 3 8.8.8.8 - check that output shows "0% packet loss".
ping -c 3 google.com - check that output shows "0% packet loss".
speedtest-cli - check that there is adequate speed in the network.
ip r - check to see if the gateway is present which should show as a "default" IP address. One imagines it's there but can check anyway.

If all of the above checks out, it could be that the server you are accessing or the links to it are implicated rather than your machine. There are other tests for that. Perhaps try another browser to discount a browser problem.

If it was only one website that has slowed down, it's remotely possible that the website has slowed your particular machine on its IP address or on some fingerprint it sees. These things happen, but it can be hard to tell at first. There's no trouble here with that website, so far, and your issue, including search, seems broader.