Two things.
People are up in arms about large corporations buying up housing stock for letting, but surely this is a better option than having man more small-scale landlords with a handful of properties each. With larger corporations comes buying power, consistency and better access to large-scale maintenance and repair services, as well as more likely stability for tenants. It's how renting works so well in many parts of central Europe - where letting is the full-time job of a large organisation, you have a dedicated team of people looking after the housing stock (similar to Housing Associations), often lower prices and the likelihood of losing your rental place because a landlord wants to sell up is far lower, so people can stay in places for longer. Large corporations are also far more likely to comply with the laws around letting, because they are more easily investigated.
England (I cannot speak for the rest of Britain) has a remarkable issue with too many rogue landlords, who skirt around regulations, do not maintain properties in a way that makes them fit for living in, and do not appear to want tenants in for too long, often to increase rental prices beyond what they are allowed to charge annually. Renting here is not a good option for people with school-age children, who may end up having to move schools several times as families are yet again asked to leave their home on a S21 (or now under the pretence of selling up, which no one will be able to enforce). Renters in this country are also not allowed to make a house their own. When you have to ask about every nail you want to put into walls to hang up a picture, when the last time your place was painted (always magnolia - to this day I hate magnolia) was over 10 years ago and yet your landlord says no, you cannot freshen up paint, when you cannot secure furniture to walls because you are not allowed to drill a hole and add in a wall plug, then you think twice about renting.
The other issue is that being able to rent does not equate with being able to buy. Someone paying £1200 on rent per month, compared to a £1000 per month mortgage, will still have difficulty getting a mortgage if the £1200 are at the upper limit of what they can afford - banks and building societies wisely take into account that interest rates fluctuate (I was stress tested to 14%) and also that annual maintenance and repair of houses will end up costing far more than the extra £200pcm someone may be able to save. This is not yet taking into account that many people in this country have bad credit ratings and large debts even without mortgages and so would pose a far higher risk for lenders in the first place.
People becoming landlords as such are not the problem here; rental condidtions for tenants are and the government's sledgehammer approach to weed out rogue landlords is having the opposite effect - good landlords trying to comply with regulations are finding it increasingly difficult, while rogue landlords carry on ignoring the law. Meanwhile, the increase in large corporations acting as landlords can only be a good thing. People would not feel the need to buy if they had more rights on things like decorating, and more stability of long-term lettings.