Yes, they have advantages against characters who do not have swords or projectiles, but usually struggle against characters with projectiles, such as Mega Man, Toon Link, etc.
A character with a sword AND a projectile is usually considered a very good character. Examples: Cloud Strife, Toon Link, Robin. These characters can all out space fairly good sword characters such as Marth, even though they both have swords.
As for not beating this dood, he sounds okay but not super super good. (e.g. He plays Roy.) I think that it is completely normal to not do too well against someone who has played the game for a fair amount of time and has mastered several characters. Just keep playing the game and keep getting better!
l just wanted to say that swordies lose pretty hard to good shield usage. lf our attacks get powershielded (shielding at the perfect time, which lets you act out of shield faster), a fast character can pressure us really hard for hitting their shield, if not just punish us directly. Same goes for projectiles. Swordies' projectiles, like Elthunder, Blade Beam, and Dragon Fang Shot are more commonly used to catch your landing than pressuring in the neutral, since they're generally pretty laggy and can be predictable. (Toon) Link's bombs and Robin's dropped Tomes and Levin Sword, however, are very safe in comparison and, if shielded, can be caught and thrown at you a second time. The projectiles themselves are pretty deadly too, leading to incredible pressure, combo potential (Links), or straight up killing you (Tomes).
l think that
would be a very good pick for you, once you get his autocancel timings down. Fox has incredible pressure, very safe on shield, honestly dumb speed, amazing combos and juggles, and you can try to play the campy, laser game too, if required (as l learned the hard way earlier. **** you, Ron).
EDIT: lol l didn't see that you already picked Lucina. That's cool too. Jab-Fsmash to victory, m8.