Can't tell if trolling, but if you are not, then my answer to you is no.
For two reasons. One, not taking Flash, especially on champion with no mobility spells, won't get you anywhere above Gold. Two, Garen is a champion that is easy to carry with at Bronze or Silver, but starting Gold and higher, you will be having a lot of trouble, not only carrying a game, even having a decent laning phase.
Garen is just noob trap. He is a champion whose abilities are directly damage related, and has almost 0 CC (just a slience) and 0 mobility. This means that he 1) does a lot of damage 2) becomes extremely tanky, but that's about it. What this essentially means is that if you fight Garen in his strong points, he will destroy you. If you fight him at his weak points, he is just trash, and the higher you climb, the more people will fight you when it favors them, and the thing is, there is nothing you can really do about it.
What I mean by strong and weak points? Well, I'll explain.
Garen, as I said above, is a champion who lacks mobility and CC and only deals damage in melee distance and gets tanky. This means that if you poke him from a distance, he can't do anything. If you dash away when he tries to engage on you, he can't reach you. If you CC him, he can't escape. These are his weak points and this is how enemies will take advantage of you. Picking Gnar, Olaf are good examples of easily exploiting his weaknesses, or simple picking champions who outscale him like Jax will do the trick and people in higher elo know this.
In lower elo, people are stupid, though, which is why Garen works well there. People will just try to fight you all the time under any circumstances and just try to jump on you. That's where Garen is strong. Since he needs to be in melee distance to deal damage and he can't reach the enemy, this is all he wants; an enemy going melee distance FOR HIM. Since he has way too much damage to compensate the lack of CC and mobility, he will then just outdamage and kill you.
Tl;dr. Garen is noob friendly and a noob trap. Easy to get out of Bronze and maybe Silver, but anything above that will make you hate your games as Garen. Imagine being in a teamfight and the enemy having an Ashe and a Janna. YOU WILL NEVER BE ABLE TO MOVE.