Sorry for your horrible experience.
Maybe mentioning which server you play on might help giving a more specific answer as to what went wrong in your case.
In general, most servers will use voice com (either teamspeak or discord) for the biggest part of their communication. Additional to that, some people will call enemy movement in either map chat (only visible on the map that you're currently on) or team chat (visible over all borderlands + ebg + obsi + edge of the mists) but especially if a squad is running around, it's better to call important things on voice as you can add information if needed and react faster. Some commanders will make use of invisible tags and only invite people who are on voice, so maybe there are squads running around that you just aren't aware of.
A lot of servers also have community guilds that you can just join without having to do anything in return, which might also be useful for communication and seeing how many people are online/ playing WvW at the moment.
A major factor that affects your WvW experience can be the time that you choose to play this game mode. While linked servers and a lot of people spending more time at home due to the pandemic have resulted in a lot of servers being active throughout most of the day, the major action will still be going on during "prime time" which can differ according to whichever server you are on (e.g. for most german servers prime time will start in the evening but one hour earlier than international servers and spanish might "wake up" even another hour later). Usually, evenings are better if you are looking for large scale zerg fights, whereas you might have a hard time finding a decent squad between noon and early evening. So another reason you aren't seeing any tags might be because you simply are playing at the wrong time.
If all you're looking for is completing the reward track as fast as possible, your best bet will be to join a tag and stay close. Additionally to that you might want to complete as many WvW dailies as possible and use the potions that you get out of them. Once you have completed the reward track, maybe drop back into WvW once in a while and stock up some of those daily potions and keep them for later uses ;-)
I personally love playing WvW, not because of the game mode itself (it has become rather stale after all those years), but because of the community. So I really hope you will give it another chance and find people that you enjoy playing with - even if it's only for the occasional visit.
> @"Lenti.3189" said:
> i was expecting to fight some players for camps and so on, but no, we form a group, we capture a camp while the other team is waiting close by and they retake it seconds later
Every objective is buffed for 5 minutes after being taken (lord/supervisor becomes invulnerable and the objective can't be captured meanwhile) so you might be exaggerating a bit ;)