God’s training 

‘’ If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not? ’’Hebrews 12:7

How can we say we are loved by God if he cannot correct us when we err; the scripture has considered those that God doesn't chastise as bastards. (Hebrews 12:8) ‘’But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons’’

Just as a father corrects His/Her child for being wrong so as our Heavenly Father corrects us; this training is done for us to be above sins we have been struggling to let go of. More importantly God chastise us to build His fear in our hearts; which caution us from sinning against him and not to be chastised by him in his wrath. When chastised we shouldn't charge God  to be wicked and merciless instead we should embrace this training and be careful of such sin being repeated; when we are chastised we should try as much as possible to take heed to corrections so as not to be victims of a reprobate mind (Romans 1:28) ‘’And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;’’

Conclusion 

You are chastised because you are loved by God; the best you can do is to take heed to corrections so as not be a victim of a reprobate mind.