Honestly, there are a lot of issues with this group, and I think if you are going to enjoy the group, you'll need to sit down with all of them and have a conversation.
Running two characters each in 4ed is bad. There are a lot of options with just one PC and adding another makes it that much worse. This problem is only going to multiply as you gain levels (and thus more options) too.
The DM is misinterpreting (in my opinion) the hobgoblin trait, and so their AC shouldn't be that high. Aside from that though, and without looking at the actual critters, adding more monsters is generally speaking, a way to account for a larger group that is also higher level -- of course adding soldiers is often less than helpful, but this is something that can take DMs a little while to realize. The problem with just running the encounters as written is that your group should then just blow through them. This will make you happy, but at the same time, Mr. XP will not be happy when he simply receives a pittance for his trouble. Making it unfun for him in order to be fun for you will only end up putting the group in the same place it is now (just a different annoyed person). This is the trouble DMs face when dealing with players who have different interests.
All that being said, one potential option for resolution here would be to simply drop XP altogether and have the DM just tell the group when they level. 4ed doesn't really require the tracking of XP since there are no spells, rituals, powers, etc., that cost XP. Mr. XP can still level quickly (if the DM decides that is good) but encounters can be scaled down so that they can run faster.
As for companions, you are right about the rules. Typically the DM creates the companion, but the players run the character (easing the DM's burden). Thing is, adding companions will only work if you first drop the second PC.
Running two characters each in 4ed is bad. There are a lot of options with just one PC and adding another makes it that much worse. This problem is only going to multiply as you gain levels (and thus more options) too.
The DM is misinterpreting (in my opinion) the hobgoblin trait, and so their AC shouldn't be that high. Aside from that though, and without looking at the actual critters, adding more monsters is generally speaking, a way to account for a larger group that is also higher level -- of course adding soldiers is often less than helpful, but this is something that can take DMs a little while to realize. The problem with just running the encounters as written is that your group should then just blow through them. This will make you happy, but at the same time, Mr. XP will not be happy when he simply receives a pittance for his trouble. Making it unfun for him in order to be fun for you will only end up putting the group in the same place it is now (just a different annoyed person). This is the trouble DMs face when dealing with players who have different interests.
All that being said, one potential option for resolution here would be to simply drop XP altogether and have the DM just tell the group when they level. 4ed doesn't really require the tracking of XP since there are no spells, rituals, powers, etc., that cost XP. Mr. XP can still level quickly (if the DM decides that is good) but encounters can be scaled down so that they can run faster.
As for companions, you are right about the rules. Typically the DM creates the companion, but the players run the character (easing the DM's burden). Thing is, adding companions will only work if you first drop the second PC.