NoNoeWay
I greatly enjoyed pubbing more before MYM came out. It wasn't flawless, but for me casual made things significantly less enjoyable and I'm not talking about the bots. But hey, it might just be me.
The good part about casual is that you can select the specific map(s) that you want to play, which quickplay didn't provide. I got around this by going to the community server list and just join a valve server that has the map I want. Not something a beginner might do of course, but it was still effective.
NoNoeWay[ Quickplay back in the day was pretty slow and defaulted to Valve servers, anyways.
I don't agree with this. Ever since casual came out, I've had to wait far longer to get into a server, have to wait longer to have the server fill up when it's empty, have this long countdown from the start every time we join a new map and at the end there's the scoreboard and map vote you have to look at and repeat the whole thing again. Adding all of this up results in less time actually playing the game, so I would consider casual the slower version of the two.
NoNoeWayItems
I agree that item changes had nothing to do with the comp environment. Even though there were a few weird changes, some of them actually seemed pretty good, and I think Zesty admits this. But it's indeed strange to bring up the odd item changes and claim that comp players are at fault for this, so that's where Zesty definitely goes wrong.
I think the goal isn't to convince Zesty that he should like competitive, it seems like a lost cause. But he should at least acknowledge that 6's/comp isn't all evil and bad for the core game. It's perfectly fine to not like comp tf2, but vilifying the whole comp scene is not the way to go. Though of course, I still feel his frustration for the reasons I said above.