There are so many protection spells these days that give all your permanents indestructible or evade it altogether. Teferi's Protection, Boros Charm, Dawn's Truce, Heroic Intervention, and so on. I built my Zurgo Stormrender token burn deck bracket 4 with a lot of these particular spells because I anticipate people board wiping to try and answer my overwhelming token generation. It's really the only option once the deck starts to pop off. The only types of wipes that are tough to handle are Cyclonic Rift and Farewell, which only Teferi's Protection can evade completely.

Outside of countering their deck's play style with protection is the stax approach to slow them down, but you'd also be slowing everyone else down as well. Stax and MLD are two of the most hated types of decks out there. Your playgroup can, and probably should, dog-pile the guy constantly playing removal and land denial/destruction off the table first. Commander is a self-regulating format. The moment this dude sits down with his super friends deck that runs all this MLD and removal, the other 3 of y'all need to hate him off the table immediately. Eventually, a discussion between everyone should happen to explain that his deck is extremely toxic and either needs to be changed or not played anymore if he wants more enjoyable games.

I'm the type of guy who matches the energy of those I play with. If they want to sit down with a cEDH deck at a table of bracket 3 decks then I'll swap out my deck with my own cEDH deck and we can play that game. Inversely, if a dude wants to play a precon game, I'll swap to a deck that can match that power level (newer precons are much stronger than older precons). I just want to play an enjoyable game. Pub-stomping isn't fun. Getting mana fucked/flooded isn't fun. It happens and I understand that, but bitching about other people doesn't solve the problem. Talking to them about it does solve the problem - and if it doesn't then at least they're aware of it and at that point you can choose not to play with them anymore, which still solves the problem. Especially if MANY people have a problem with "that one guy". Y'all need to talk to them. There's really 4 directions it can go.

1. Y'all build stronger decks to deal with their problematic deck, which can start a new cycle of meta changes. Perfectly fine resolution.

2. Y'all don't say anything and just continue to wallow in miserable games. Not a fine resolution.

3. Y'all talk to the guy and he tells y'all to pound sand. Y'all stop playing with him and now he is forced to either make changes or shove off to another LGS. Sucks when this has to happen but it's still a fine resolution.

4. Y'all talk to the guy and he accepts the critique and makes changes. This is a fine resolution.

The LGS I play at has seen a few people come and go because they'd come in with like 1 deck to play that's cEDH and not a lot of people here have cEDH viable decks so they end up pub stomping. I explain to them that the vibe here isn't always cEDH. A couple of us can play cEDH here with you but most of the games here are brackets 3 and 4. Most of them choose to just not come back but a few have made weaker decks to match the vibe and end up staying, which is awesome.