Using vanilla weapons will most certainly help your team better. Unless you're the type of player who only cares about kills. You can fire off the DH all you want, but in the end the splash damage will do you in.
For someone with good aim, the DH is a great weapon. Get better at aiming.
Not every class has a sniper rifle, Nick.
That's why you can change classes. So you can switch to Sniper and take out the Demoman when he's terrorizing your team.
Equalizer!
One hit every light class while you're at 150 health!
One hit other classes when you're at 100 health!
Take a look at the table.
http://tf2wiki.net/wiki/EqualizerBONK!
Incredibly useless drink that removes your long range capabilites!
Run past the sentry, grab the intel, then remember you can't bonk with it and die!
Bonk is supposed to be used in CP maps when the enemy has a large stronghold set up.
Huntsman!
Barely aim to get headshots at Wisconsin-sized hitboxes!
Do what snipers are not supposed to do by assualting!
Yes, the Huntsman is cheap.
Ambassador!
Forget engineers and go for the snipers! After all, they're the ones stopping your team from capping, not that sentry in your intel!
Make perfect headshots while moving at any speed!
Completely negate the use of the Razorback, making it a waste of memory!
You seem to play on servers with people who aren't alive, sorry.
Targe/Eyelander
Not good at Demoman? You don't have to be with the use of this unlock that never makes you have to use explosives!
Charge at jumping opponents to unrealistcly take their head off by swiping at their leg!
Two hit every light class!
They nerfed it recently, and even though it is still one of the cheaper weapons, in no way does it make a Demoman unstoppable. Change class, respawn, and move on.
In conclusion: Stop hating things because you aren't good at using them in the right situation.