Old UI is better. there isn't even a search by mod title in the new UI unless you go to the top and search by mods once you're at your preferred game. Sometimes updates are a step backwards in functionality. Sometimes what you already have working shouldn't be messed with. sometimes new features is just feature bloat.
This "minimalist sidebar" obsession needs to die. it only works on sites that you don't need to have dozens of functions hinging on interacting with the sidebar.
Please rollback to the old UI. There was nothing wrong with the old version. Stop obsessing over "new." You don't need to "leave a mark" or whatever you're doing UI designer team. You just need functional UI.
Don't let sunk cost fallacy lie to you and tell you that you need to stick to the new UI because you've spent (wasted) so much time developing it.