To play devil's advocate, sometimes playing the objective is the toxic thing when the server is low population. Some maps in this game have very long flank routes, so if offense in a low population server constantly split up to try flank routes to hit the obj, it can create dozens of minutes of waiting for both teams where nothing really happens. Sometimes it's most fun for everyone when a low-pop server has an unspoken agreement to all push the same route every time, because that's when the most team fights happen. So it comes down to whether or not you consider battling with the enemy team fun, or getting a text message that says "you win" more fun.
That said, I don't really get mad when people obj rush, it's easily counterable by becoming an obj camper. The thing that gets on my nerves is actually the opposite, when the last offense players run and hide on the map to preserve their K/D. I don't mind if the last players just want to have a melee duel, but true time wasting like literally hiding in obscure corners of the map is probably the most toxic thing. It's even worse than tk. Tk means one or two people don't get to play for a round, tw means everyone on the server can't play for minutes for no reason.
One general problem is that your issue doesn't come with a solution. If there was an effective reporting feature like you mention, it is made irrelevant by the low-population, theoretically the few servers left could moderate more harshly by banning more players... but banning toxic players might kill the game faster than their toxicity does. This is the only game I play where I have to wait for certain times in the day for a server in my region to have players, I'd gladly deal with some trolls rather than have the game be unplayable. Plus I think there's a bit of charm in trolling, the internet has become such as sheltered place in today's age, that the few places left with little moderation like minecraft anarchy servers or MBII servers are kinda nostalgic for me, and appeal to that bit of libertarian inside me that appreciates the freedom to just say whatever.
