I saw your stream awhile back, don't remember when but I do remember this.
The map was Horizon and the first point was lost. Like, 5 of them were on it, it was lost and you dove in and said in the comms "I'mma contest it". You died, that's a given, it was 1v5. The problem when that happened was, you fed the enemy team's ult charge, and since you're Dva, you fed them considerably.
And you staggered your team and didn't have enough time to properly position yourself.
That's the only thing I can remember, and euh I guess that was a mistake you did.
If ever you stream again, I'll be sure to check it out tho!