This means we have to wait twenty years before bitcoin becomes as popular as the internet. Judging how the dollar is going south i would say that bitcoin will be adopted a lot quicker than anticipated
Not really, you can't tell when it'll happen because a lot of things change very quickly. Who knows it might take less than twenty years.
I've also seen people online complaining that bitcoin is too hard to use and that it's too confusing.
Those people who complain about Bitcoin being hard are mostly new users. Once they get the hang of Bitcoin they'll know that it won't be hard to use.
Is this another reason why people compare bitcoin today to the Internet in 1994?
Maybe it is one of the reason why it's compared to the internet in 1994 because you mentioned it's still new and not everyone has access to it.
It's only hard at first because you have to set up your wallet like putting a strong password and storing the see which is slightly time consuming but after that it should be easy to use. Also with several wallets to choose from new users shouldn't be having a hard time using Bitcoin tbh.
At that year 2009 bitcoin wasn't yet popular and not fully developed as second money converting into fiat money.
FTFY