Then u have chosen wrong way to access OTT content....chose XStream Play subscription + Zee5 + Hotstar.....also Airtel is providing complimentary subscription (recurring too) of XStream Play Premium / Mobile , Disney+Hotstar Super to its new/existing customers with many of its broadband / Mobile / Airtel Black Plans, do check if u r getting the same by checking "Claim OTT benefits" section on Airtel App.
Also opt for Airtel Black Plan which includes both DTH + Broadband, include ur current connections in it as it will not only save money on monthly rental but provide host of other benefits like Free OTT Access (Airtel XStream Play, Disney+Hotstar , Amazon Prime Video, Netflix) but even 85% or above discount will be provided if u opt for any DPO bouquet....if u opt for Make My Own Pack option then too 50% discount will be provided on NCF ..... Apart from this u shall get Free Service Visits, Priority Resolution of Complaints / Dedicated Customer Care Team who shall attend ur call without or with minimal wait time & many other benefits.
Also it is not unethical to provide combo plans ....all operators having presence in multiple segments/businesses do provide such combination of plans so as to converge its services being used by customers under one umbrella which not only helps company improve retention of subscribers across these avenues thereby improving revenue but also scale up its foothold in these areas by giving customers option to opt for either Airtel broadband / mobile / DTH connection which they may not have at present by giving good discounts / benefits on the same. Jio too provides Live TV Channels + OTT alongwith its Broadband , Mobile Combo Plans, only difference being that Jio TV/Jio TV+ is a OTT platform which provides Live TV Channels while Airtel provides them via DTH Platform.
Reliance had infact bought majority stakes in DEN, Hathway Cable to get fast expansion for its broadband/fiber business and now all its Cable TV subscribers get Jio Smart Android Box so as to access TV Channels via satellite or via Jio TV / Jio TV+ alongwith other OTT apps