you don't realize it the first time, but on the replay you slowly notice how unoptimized every opponent set is, and how abusable most fields are.
you don't need "meta mons" just use your TMs.
opponents are not statistically superior, in fact if you are close to the cap, a lot of the time they are mostly lower level than you, with an overleveled ace. unless you mean them having proper EV spreads from charlottel onwards. just gonna say in this last update the EV power items have been updated to give massive amounts per kill (+32 i think?) so you can fully EV train a full team in a matter of minutes.