Totally agreeing with shrang! If you are always using the same cookie-cutter teams and then say ''OU is boring'' then this is clearly your fault. You don't always have to build the most competitive teams that can get you at the top of the ladder you know. When playing on the ladder, sometimes having fun is more important than winning more. You can build a perfectly viable team that uses some original Pokemon or strategies and still win the majority of your games with good playing. I really don't get some good tour players that bitch about the metagame being boring when they don't really try to use anything to change this. Also, it is much more enjoying, fun, and rewarding to peak at the ladder with an underused Pokemon/strategy, as it means you have to try harder, and i thought that good players liked such challenges. You have tours to go all out and use the best to try and win, why do the same to the ladder and not just relax and try to have some fun?
In the past month, i have been using two of my Moltres rain teams, one HO team with Accelgor and 5 Pokemon that don't care about hazards, and an offensive team that features SubPass Mienshao, and they have all been very fun to play with and were very decent when i was playing correctly. I get it that this meta is not the best ever, but bitching is not going to do anything, so try and change it a bit yourselves too (the ladder at least).
As for offensive Zapdos, from the little experience i had with it, it is a good option to use alongside vicious offensive Pokemon that have troubles with Breloom and Scizor, two offensive Pokemon that are difficult to deal with for some teams, and Thundurus-T rarely can take a hit from. For example, Terrakion makes for a very good partner to Zapdos, as the only way to deal with it is priority, revenge killing, and a few soft-counters, such as Landorus-T, Gliscor, and Hippo. Zapdos deals with the priority that troubles Terrakion, with some of the revenge killers that trouble Terrakion (Jirachi, choiced Fighting moves), and even with most Ground-types provided it switches in for free.