Agreeing with how retardedly broken follow me is, its literally one of the most uncompetitive pieces of garbage this metagame has to offer. It literally means you can't touch the other mon, so tail glow surf manaphy with a life orb gets free kills vs whatever. Belly drum mons with spread moves? Follow me means that both of your mons need to attack on the first turn of the belly drum mon, if it outspeeds, just gets 2 free kills.
I'm not convinced this is uncompetitive yet, since I haven't had the worst of the experiences when i encountered this strat, and there are ways to deal with it.
For the time being, here are a few ways to deal with it:
Fake out - It has higher priority, so you can use the 1st turn to possibly ruin the other poke's plan or possibly KO it with your other poke. This works if the other poke doesn't use protect.
Taunt - This wastes your 1st turn using taunt on the Follow me user, but in the following turns you won't be bothered by it.
Moves that hit multiple opponents - These moves aren't affected by Follow me or Rage powder
Using pokes that could possibly OHKO or 2HKO if it has sash - Since the most common users
at the moment are Togekiss, Togetic, Clefairy, Clefable, and the bug type counterpart move user of Rage Powder, Amoonguss. It shouldn't be too hard to figure out some pokes or moves that deal with those pokes.
If other Follow me pokes turn up in the meta (there arent many more), the same strat can be used on them.
Also, all of the rage powder users are weak to Fire except Volcarona and all of them are weak to Rock except the Tangela evolutionary line, the Foongus evolutionary line, and Carnivine.
Your best bet right now seems to be using multi target moves, since Wide guard doesn't have much use at the moment. It doesn't have many viable users either, and even if you have it on a poke it's hard to predict when to use it unless you're sure that your opponent is gonna use a multi target attack.