I think it depends a lot on the specifics of the situation.

Did you buy a single family home / house that you’re living in, and renting out part of to help pay your mortgage? Then it depends on the rent you charge.

If you charge market rates and you can afford to charge less than market rates, or if you hire contractors and maintenance people for the unit that are cheaper / worse than the ones you use for your own unit, then yes, you are being exploitative and hypocritical.

If, however, you treat the unit like your own and charge below market rates then no, you’re not.

If you build an addition on your house, or build a laneway house or something, then it’s more reasonable to charge market rates for rent because you’ve actually added new housing to the area, an act that in itself should help to slightly drop rents. Same thing if you buy vacant property and build rental units on it. However, if you continue charging the most you possibly can long after you’ve made your money back then you’re back into the territory of being an exploitative hypocrite.

And if you’re just in a hot market and buying up houses / condos, and renting them back to people as is, or just doing the cheapest and shittiest job you can turning them into apartments, then yes you are being a hypocrite. At that point you’re just using your capital to buy up a limited quantity item and sell it back to people at exploitative rates. It would be like being stranded in the desert and buying up the remaining water and then selling it back to people for a profit. You’re providing no value to society, just using past success to force people into a corner where they have to pay you for a necessity that’s in limited supply.