a normal game

You took too long to castle.

Qf3 was quite bad. Your Queen is not going to do much until you can get 2 more minor pieces to attack h7, and then it can be stopped with the likes of ...h6.

After having committed your Q to the kingside, you sent your bishop to a 3 move detour that umm

- attacked a bishop that was already defended and wasn't doing much anyway

- was always going to accomplish nothing,

but the best part was it

- resulted the capitulation of your Queenside.

If he'd played 19...h6 you won't even have any attack going and would have to pretty much just play 20. Nf3

5.........Bxf6? 

   the position was += after Bxf6 it's =+

 In 1 move you

  1. wasted time

  2. lost the bishop pair in a semi open position

  3. uncramped black

  4. alowed black to have the advantage