Oh, I've since used the Lite version, and while it isn't as slow as the original, it's still much slower than Tusky.
I don't know how to explain it better but the responsiveness is more akin of a mobile website than a native application.
I haven't heard of others having this issue though so I must be facing this issue because of slow internet or storage speeds.
@fedilab@toot.fedilab.app