First, I thank Jackpotter for the opportunity to try my luck for free. However, this is one of my worst betting results in recent time.

A 2/5 score shows that the analyses were too illogical from the start.
I have made many 0/5 bets in my life, and make me wonder, why I didn't just go the other way on 5 and win 100x. These days I try something a bit different, I pick one reasonable bet that's not so safe and put a few small games to boost it around 50%. This one almost worked but I shouldn't have trusted my own team who was probably drunk in the celebrations and probably came to the game without sleep and too much sex

But how to ignore Barca 2x righttt?

Your strategy is cool, especially due to the fact that you didn't just select that high odd among them anyhow, but was on a good team. I didn't even expect a big odd for Barcelona against Deportivo Alavés that was on the 19th position in the relegation zone. Perhaps the bookie, based on experience, knew that Deportivo Alavés was desperate, and the fact that they were at home was another thing. I don't think Barcelona was even serious with that match, not minding how many tickets it would have ruined.
Now, I think 5-team parlay is even getting too risky for me, I would try to limit it to between 2 and 4, and see what's going to come out of it. I often lose mostly 1 of my leg parlays, and sometimes 2. The 2-for-5 parlay loss was so unusual.