Website slow : my fault or the host?

if ypu fix your host fast problem, I suggest to use a cache plugin like Wp Fastest Cache or Wp Super Cache. Exactly Wp fastest cache plugin is great. We use it on our website, you can take a look from this link

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)