You have to have a compelling reason to transfer. If the transfer is for serious health or financial reasons, then yes, transferring is good. If the school doesn’t have the major you want, and you’re not too far along in your degree…and you can afford the new school, then yes.
If you’re going from a “t-15” to a “t-5” then no. Rankings are the single worst criteria you can use for choosing a college. Why? They don’t provide any useful information. It’s just a group of yo-yo’s saying “this one” is BETTER.
If there was a really compelling reason to transfer, you would’ve said so in the post. I would say, just keep doing what you’re doing. If you want prestige, graduate school would be worth quite a bit more.