I just had the worst match ever. Terran(me) vs. Protoss(them). 1v1. game starts out with me going MMM, but I notice them building a robotics facility so I change gear to vikings. moved my vikings in too early (they only had one colossi), so they started warping in stalkers. I built tanks.
They continued making colossi (despite seeing I had their counter) and stalkers the entire match, never once did they get in my base. I destroyed every expansion they made, and made 2 of my own they didn't find until the end (they destroyed one of mine earlier though, so they lost 3/3, I lose 1/3).
I'm about to make the final victorious sweep into their base with my amassed army of perfect counters to their army composition (I had been scanner sweeping/scouting them the entire match, I knew every unit they had and knew almost exactly where they were at any given time) EXCEPT just before I mobilize their mother ship moves in.
Cool. I got vikings an missile turrets. Move my vikings in, get void prisoned or whatever the ability is. Ouch. For some reason my tanks can't see the stalkers standing IN MY MISSILE TURRETS SITE so the stalkers clean up my marauders and tanks, my vikings come out, are able to finish off the mother ship but get destroyed by the stalkers.
What. The. Hell.
My army that was MADE TO BE THE PERFECT COUNTER TO HIS, defeated by a single unit. WHICH I HAD THE COUNTERS TO.
It was impossible for me to lose. Gatdamn SCIENTISTS who devote their lives to Starcraft and researched every possible matchup and could tell you the outcome of every single match within the first five minutes would not even be able to fathom what occurred there.
I had map control, I had superior army composition, I had superior scout information, I had superior base defenses. I was, in every way, his better... but one mothership turned it all around? What the hell. What the gatdamn hell. I think I should just quit video games.
Reality will warp itself so I will lose in every video game...
edit: Just had my best match ever. Terran Players: for 1v1 matches set your votes to scrapyard. IMMEDIATELY lift off your barracks, move it to the middle 'island', fasttech to banshees while you plop a barracks in their base with your spare scv that couldn't fit in the command center. pump marines (while fastteching), destroy with banshees.
it was FUN as opposed to competitive. It was freaking hilarious!