I really think it comes with the frustration that Bioware never listen his players. In comparison to the numbers of topics created every day focusing on all aspects of the game : suggestions / bug and issue report / improvement / classes balance, etc..
Most of them aren't worth it but a few ones are very good and Bioware should listen.
But nothing is done. We have been waiting for years for new operations (only because the community ask) and it's not even right here and when we finally know there will be one, it is just one boss with some others unlocked one month after another.
So I think the frustration is turning people into toxics because they're frustrated to see a game evolve but never in the right way, one example among many others is Galactic Command system that all players are taking for chinese players and have to farm a year to have a decent stuff for one character.
In conclusion I totally agree.