Hello 3469practice, I may be wrong, do not know if you are in the UK or not
but here since we had North sea gas piped, the flame is much fiercer and stoves had to be adjusted, which your landlord may not realise, this had to be done via a Government licenced Gas Company for safety reasons. He may have installed a cooker that had not been adjusted. You can purchase worktop size portable single or double electric hobs that you simply plug in to your normal electric supply which you may consider.
The only other alternative I can suggest is that you use very good thick based cooking pans so that your food will not burn on the outside so quickly, leaving the inside to cook properly.
I hope this will help you, good luck