mmmm... well, you may be right, but if you see, it`s allways the same. In singles, some pokes are weak and will always be weak, but in doubles or triples, there are A LOT of possibilities avaiable. well, that`s my point of view :/
Lol no not at all. For one there is the obvious addition of new pokemon generation by generation, but more importantly is that to perfect a team you need to make ever-so-slight changes to your pokemon and their movesets, and once you do get one near perfect, odds are soon after you'll have to start over because someone will find a counter to that team. Competitive battling is ever evolving, especially now at the very start of Gen. V.