Dear friends,
I am playing 1/2 No limit Holdem $300 max tables in live casinos. I do not have sufficient bankroll so I forced to play always shorthanded with only $100 in. (I do have about $400 to spend, so I prefer to have about 4 shots at the table). With such minimal amount I always manage to be up to $300, $400 but than "big" hand is coming when I have to go All In. I do not go all in unless I am 70 or 80% favorite. But guess what? I get beaten every single time on the river: set by flash, straight by flash, flash by full house.... If I would chase my open handed flash with 40% favorite I will not get there, but my opponents have no problem to beat me with less outs.
Am I really unlucky? Any suggestions? Year is over and I am going through the same nightmare every two weeks, again and again.

Find lower limits where you can play with a full buy in amount, if your short stacked you will be bullied and people with call you more as you have nothing behind you.

You are playing with scared money my friend, if you can not afford to lose play at a level you can!

Thank you! Agree, but there is no lower limit in casino than 1/2 Should I go with maximum buy in amount of $300 even if it will be only one shot deal?

You have to let your ego go. Chances are you suck. If you're only going all-in with 70-80% equity, you're folding too much. That's a mistake and I guarantee you're making a ton more.

Learn to play well instead of blaming luck.

This is the exact opposite of what people should do. Short stacks can't be bullied because they're committed to the pot rather quickly. They shouldn't be calling because he has not as much to win as a full stack.

If you "always manage to be up $300 or $400, why not simply cash out when you are ahead and start from $100 again?

Anyways it is unlikely you are as unlucky as you think you are. First of all, in order to "always be up" $300 or $400 you probably won a few of these all ins before right? Do you think you should win every all in even if you are a 70% favourite? Do you know the odds of winning at 70% three times in a row?
(Hint: It's .7 * .7 *.7 = 34%). I'd suggest you start to keep track of how many times you go allin vs how many times you loose. You may find that you are doing better than you think.

You're not awfully short stacked if you have 1-300 in front of you at a 1/2 game, but what are you going all in with where you so happen to get rivered "every" time?

Maybe your all in range is to wide or too quick and you're going all in on hands you shouldn't, don't donk $300 dollars into the pot until you have the nuts, AA KK preflop or a set on a dry board. When you feel you are running bad it probably means its just time to tighten up your range.

Good advice excent don't cash out and cash back in, that is not only illegal, but very disrespectful, and cheap and weak and ****ty all around.

Your whole post is complete rubbish but I'm just going to single this out. The cards don't have memories. They don't know you're running bad. If you deviate from your strategy because you "feel you're running bad", you're tilting. When you're tilting, you should do something else.

+1

Recognizing tilt, and when you're altering your play sub-optimally, is just as an important part of poker as anything. It's an under rated skill in poker.

I totally agree the cards don't have memory! Having said that a lot of the times when you "feel" you are running bad, its not always because you're running bad its because you are over playing you're marginal hands and just getting beat.

This is what you originally said that I quoted:
That is a form of tilt. If you're making adjustments to what you think is a sound winning strategy because of your (recent) results, that is tilt. What you're saying is "if I didn't lose, I wouldn't change that part of my game but since I did, I'm going to get rid of it" and that equates to tilt. If you're knocked off of your normal game, you should do something else instead of pass up "marginal hands" because you're clearly not in a state of mind to play your best.