Hi, I've copied this deck:
https://mtgdecks.net/Pioneer/atarka-red-decklist-by-manalacaio-2201429
but I want to make it stronger and more competitive. Any ideas how to do it? The stronger, the better

Thanks in advance;)

Replace Wild Slash with Burst Lightning (Burst's "bonus" is relevant more often), Pathway with Thornspire Verge (Verge is only "off" when you already have green), and tweak the sideboard to your meta. You can also replace a Ramunap Ruins with Zurgo Bellstriker or Coyote if you feel lucky. The deck already executes about as well as it can.

Ok, thanks for your advice. Why do you suggest to replace Ramunap Ruins with creature? Is this deck really that good? Because I was on a tournament recently and I've won only one game out of six :/ I was missing a few cards, but only a few thatswhy I treat this deck as a whole copy of atarka red. Maybe there is some way to transform it into something even stgronger?

Ramunap to creature? To keep up the aggression as long as possible. It mulligans well to find that second land, but fears flooding. Personally, I like 20 lands. Could you share what you played against, more or less? I'll test the matches myself (if I can) and offer advice. Your environment could be hostile, but maybe there's a workaround. This is a relatively reasonably-priced deck, so I'll try to keep suggestions budget-friendly if possible.

It was my first tournament after 15 years without playing I'm afraid I want be able to tell you what I played against now, I dont remember exactly :/ ok, now Ramunap to creature sounds reasonably Price doesnt matter, I want strong deck Thank you very much for your effort by the way

Welcome back! Sequencing is critical¡ªyou may get just enough to win, so my suggestion is to be open to different lines of play, and ask yourself a couple questions. They're similar, and if you know something even better, let me in on it:
What will turn 4 look like? I knocked a combo player to -17 on this turn, but against a deck with tons of interaction or big creatures, it may be wise to aim to put them to -1, or even 4. On the draw against another lightning-fast deck, it may be best to focus on trading creatures.
What will the board look like when I win? If it looks like it'll be turn 7 with a burst of damage, start planning as soon as you realize it, even if it relies on topdecks or the opponent not having something that they probably have.

Thanks Sorry for late response. Oh man, I've played only a few games with my friends and those 6 games on tournament, I dont know what turn 4 will look like. Maybe when I will fully complete this deck and play more wisely, Then I will win more games. I'm just upset with the result from that tournament Now I'm a littlbit a noob, so this deck main mechanic is to play as many creatures as fast as I can and defeat the oponent this way?

Most games, yeah, you just want to rush them down, but plot and surge give you an edge. You can save up for a huge attack on turn 3 or 4, or if your opponent is holding up removal and not pressuring you, you can plot stuff and waste their mana now, then overwhelm them on a future turn, especially if they dare to tap out. The threat of Bushwhacker and Atarka's Command can hold back their forces and give you time to set up your big turn, as well. This is when having few lands really helps: you draw spells while they draw land. As a trade-off, if they're fast and go first or can slow you down when you don't have plot or surge, there's not much to do about it.

You can learn to maximize damage by goldfishing, but I also like to goldfish while imagining that my opponent starts with 2-3 Fatal Push. What's the fastest way to deal 20 damage when they can pick off 2-3 creatures pretty much as they please?