Hey Blackstone. Yes, everyone, I mean EVERYONE, suffers this. It certainly feels like suffering, when you do everything right, and someone who does it all wrong beats you.
So think about that. Who are you going to be able to win money from? Certainly not someone who only plays correctly against you. Either they will win money from you, or you will be break even against them and the casino rake will cost you both money.
The person who plays badly, incorrectly, who calls instead of folding, raises when they have nothing because they believe bluffing is scary, etc, etc, will beat you. Sometimes. It will seem like they always beat you when they shouldn't, but that isn't true. The mathematics holds up over the long term. You WANT these people to play this way, because they provide your winnings. If they didn't sometimes get a reward for their bad play, they would just stop, and you wouldn't have anyone to get your money from.
There is a reference in another thread here somewhere to an article that Sklansky wrote about poker learning, you should find that and read it if you can. Poker learning is really understanding this concept. Poker does not, unlike most sports, passtimes or activities, reward the best play with the best result in each contest. It guarantees that the correct decision taken in each situation will lead to a positive outcome over time. That is winning. You will make money.
Personally, and I have written this before, I can tell you that I have experienced sessions from hell before. Every experienced player will know the same. My worst? My first NL50 session on Titan poker. After being successful at NL20, and moving up, I played 300 hands, and lost 12 buy-ins. That is 12 x $10, which was more than I had won in two weeks at the previous level. Devestating! In reviewing the hands, there were some marginal situations where I could have saved myself a half stack maybe, but I played AA, KK, QQ, AK etc, and other hands according to the SHC, and I didn't win. Even the preflop all-ins, with the Big Pocket Pairs, got cracked. I have learned to read the signs a bit better now, and these days, when I see that starting to happen, I call it quits once it gets to six buy-ins or so. Poker will still be there when I come back next time.
Most important thing? Don't hate yourself when your correct play loses pots to bullshit. Don't feel humiliated, intimidated or overwhelmed. You haven't done the wrong thing, you are not inferior. In fact, you have made money. A correct decision wins money, regardless of the outcome of the particular hand it was made in. Conversely, an incorrect decision costs money, also regardless of the outcome of the hand in which it was made. The only challenge here is to keep reviewing, keep seeking the truth of situations, and increase your skill. Increase the number of correct decisions that you make. And dip your lid to the donks, god bless em, where would we all be without them?