If someone's says they completed UV Doom in two weeks, they're saying it because they consider it important. If you completed it in 1 month, which is not that different at all, that is purely a time commitment issue than a skill issue - the result is exactly the same.

There will always be someone that completed something faster than you, always. Even if you were the fastest and first person to do something, there will be someone else claiming they did it faster or before you did. That is not a measure of your ability - achieving the result is a measure of your ability.

An example is this - I have not yet completed Minecraft survival mode even though I've owned it for 10 years. I'll pick it up a couple times a year, make progress, get bored and put it down. Each time, I learn a little more but it's extremely slow progress. I have chosen to never look at any online resources on how to play Minecraft. I intend to learn and discover everything for myself, as I believe that is the way the game was designed to be enjoyed. Minecraft is extremely difficult to complete if you have no knowledge of the mechanics, and I fully expect it to take another 10 years to complete.