People don’t understand how VPNs work. There’s no such thing as VPNing to a “bot lobby.”
Instead you are just able to pick which servers you are connecting to. You can make an educated guess as to which server is going to have the least skilled players, but it’s all tied to region, not skill level.
You can assume that players in a certain region would be worse at the game, and that’s why someone would VPN to say, Oceania servers. “I bet everyone in this part of the world isn’t as good as where I’m from.”
You can VPN to certain regions during specific times of the day, to try and further manipulate the type of players you’re facing. “If it’s always 8:00 AM in the servers that I am on, maybe there will be less of demons at that time of day.”
What you cannot do with a VPN is select a server that isn’t tied to location, but skill level. I can play in Oceania servers on command, but I can’t select bad players on command.
It is worth noting that VPNing to servers across the world may get you easier lobbies… but your connection will be so much worse that it’s really not worth it. I’d rather play good players on 30 ping than absolute bots on 130 ping. You’re guaranteed to lag all over the place if VPNing super far away.
I have a VPN and the only thing it does for me is guarantee I get servers that are close to me. I’m tired of playing on 50+ ping across the country, so I got a VPN that guarantees I’ll be on either Utah or Texas servers, ~25-30 ping for me.
I think your friends might just be significantly better than you, and it’s not because of the VPN. If you don’t know what a VPN does, there’s a good chance you can’t tell the difference between a 30 ms lobby and a 50 ms lobby. My buddies who don’t play a ton can literally not tell when we connect to a bad server, but I feel it in every single gunfight and the second I start moving around.
If you can’t already tell that, you need to just improve at the game before thinking about taking these types of strides.
TLDR: A VPN, at this point in its usage, is only good for getting you good connection lobbies. There’s no such thing as a bot lobby that it can connect you to.