No, this is only 2018 current condition. If I compare with last year (2017) there are many legit airdrops. Like BLUE, ELTCOIN, EREAL, BITWHITE, REBL, and many more. So, I can say 2018 is the worst time for airdrop. I think the last Airdrop which gives good token was POLYMATH.
You're right, when the market has few participant, there is many good airdrop. I wish i was born earlier 
. And now when many new participant join in this market, there are many scammer create scam airdrop to steal user information or steal token from them. So sad