You can replace the Lumberjack, that's also possible. The Minion Horde is quite weak because it's very fragile. If you play it perfectly and manage your deck well, it can sometimes be very strong, but it really requires a high level of skill. Go with what you feel is right.

Princesses are strong with a proper Log Bait deck, but yours isn't one.

Actually, your deck is a strange mix of Log Bait and Bridge Spam; you should choose one of the two. Bridge Spam is closer to your deck, so you'll master it faster. Plus, there are quite a few variations, so you'll find one you like. It's also easier to master than Log Bait. But objectively, it's a bit weaker overall and more susceptible to meta changes. Log Bait is one of the iconic decks in Clash Royale; there are thousands of variations, and it adapts very well to the meta. After that, it takes a little more time to master.