I don't know about you, but I've put a lot of thought into the subject. After all, let's consider some things:
1. Orcs were created and breeded over several millennia to be the best fighters possible
2. Orcs spent their entire lives training for combat
3. Orcs were twisted and mutated from what base creature? The elf, the greatest fighter in Middle Earth
4. Orcs get a bad rep for using scavanged armour, but think about that for a second! Who are they scavenging from? The dwarves, the elves, the Gondorians, all some of the finest smiths available.
In my opinion, the misconception that orcs are weak is because of LotR video games were forced to make them that way in the interest of balance. What do you guys think?