There's no guarantee anyone will raise you if you die in Forked Tower. By joining solo instead of with a proper premade group, you kinda sealed your fate. You're expected to execute mechanics properly.
Looking at the VOD posted above, you failed to execute the Hot and Cold mechanics on the 2nd boss and died from the mechanic check raidwide.
There is no reason for pre-made group to raise you for the following reasons:
1. You become a burden and can easily wipe them on later mechanics. (The group almost wiped on First boss cause meteors baits were abysmal)
2. Bosses are scaled - less people = less HP on following bosses (scaled content yippie)
3. Raises are restricted requiring the use of Chemist raise (If you want to flame chemists for not raising you be my guess

)
Point 1 alone makes it not worth raising players new to the tower. It takes forever to get into tower and organizing 48 people into the same instance - we spend 1-2 hours just to achieve this on a good day.
Obviously killing people/swearing at people is a no-go and shouldn't be done by any premade group. Asking politely not to snipe is totally fine though, and if someone doesn't respect that, it's also okay but they should know they're on their own.
Before anyone mentions ToS - yes, hateful/disrespectful speech is against ToS, but I'd recommend checking policies about obstruction of play, before being keyboard warrior.