The law doesn't protect landlords. Unfortunately there's not a lot you can do. If you want them out fast, you can take the unethical route - e.g. hiring "debt collectors". But then your house will be at their mercy.

My luck with tenants have not been great too. 1 average tenant and 3 bad tenants over the years made me realise property investment isn't for me.

For one of the cases, I've tried cutting electricity and water, locking the gates, reporting to the police and whatever legal routes you can think of without spending too much money (lawsuits are expensive). Ended up getting people to follow their family everywhere they went until they couldn't take it anymore. The state they left the property in.. let's just say the sum of getting everything fixed up costs almost three times the accumulated rental I received from them. This isn't even including the 6 months "free" rental and unpaid electricity and water bills.

Never again.