You don't lack creativity, I think you are just scared of making a play outside of your comfort zone and seeming like a bad player.
You can see patterns and mistakes on your opponents, what you are missing is to find the most profitable way of exploiting those mistakes.
For example, when you have players 3x-ing pre with their premiums and 2x-ing with lesser hands, you can start folding a lot of your hands that don't play well postflop when they 3x.
So when they 2x you can start 3betinng light and cbet a lot of Ax, Kx and dry flops.
Also if they cbet only when they hit, you can give up with no equity when they bet, and bet every flop and turn if they check.
These are just general examples, if you do them all the time vs some good regs they will catch up on it.
The point is to try and exploit as much as you can without changing the fundamentals of your game.
Good luck!
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