Can my landlord evict me or raise the rent just because they want to?

No. Any rent increase must follow the RERA index bands and the landlord must give 90 days' written notice before renewal - refusing a lawful increase is not grounds for eviction. Eviction requires specific legal grounds: sale or personal/family use (12 months' notarised notice), major renovation, or non-payment within 30 days of a notice.