Basically, you're missing trainers and you have too much energy. Trainers should be more than 30. Energies, around 15 as much ideally. 15-16 for Fire decks can be good as tend to need "high" amount.
And you have too much 1-off cards. To make it consistent, you need to add 3-4 copies of what's important. If not, you will be playing to the card you draw, And most of the time won't be the card you need for your strategy.
I don't know why this deck is Expanded, all pokémon are Standard. 1 N, 1 Juniper and 1 Brigette + 2 Burn energies is no reason enough.
There's something called "The staples", for expanded:
1 ACE SPEC
4 Vs seeker
2-4 Prof. Sycamore/Juniper
1-3 Lysandre/Guzma (at choice)
More or less. And for fire, Add Kiawe, depending the deck but specially add Blacksmith at least 2-3. And you can use Battle compressor.
Of course there's the option to play Cynthia, Acerola and other Standard trainers but I wouldn't miss the above mentioned.
This said, I don't see the utility of Entei without being able to ensure the energy discard. Magcargo would be the key. But you could also use cards like PokeNav, Trick shovel, Mallow... This at least would make it hit for 140+Choice band = Lele KO.
3-3 Houndoom should work. Arrives to 130 damage (having more cards in hand). 160 with Choice band would be better even it's a 2HKO for most rivals, so I would play 3 or 4 Choice. You need to be sure you have more cards in hand than opponent. N can help, Ace trainer, Sycamore/Juniper, Energy retrieval and those Extra drawing cards like Apricorn maker, Prof Elm's lecture and some that don't use to be played a lot like Mars, TV reporter, Kahili, Sophocles, Delinquent...
To have a Stage 2 main attacker, Rare candies. The "pro option" would be a 4-1-4 line with 4 Rare candies and a deck around that pokémon. For 2 copies, 2-1-2 with 2 candies could work. Also Evosoda would help for any other pokémon in your deck.
Don't miss the balls, Ultra ball, Nest ball, Level ball...
I guess Psy energies are just for the GX Lele's attack. It works regularly?
A wonderful combination is Ho-oh GX 1st turn+Kiawe. Turn 2, use the GX attack to full the bench with Stage 2. But to play it consistently you'd have to include 3-4 Ho-oh to be sure it's your starter, and more than 1 Kiawe for if prized. A different strategy, a different deck. Anyway, most of the times, this combo is used to 1HKO what's in front in 2nd turn (not to full the bench).
I've not seen in (competitive) play Adventure bag or Choice helmet, Big malasada, Kahili or Mars before. Probably there's no space once you make a Staple build of a deck but if works you can keep it.
Last, Heat factory Prism star!! And an extra Altar or Scorched hearth, or Field blower. Lysandre Prism star would be a crazy tech too (in combination with the Charizard's GX attack, LOL).
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