I lived in NYC for a few years and tried a wide range of cheesecakes both in restaurants and homemade by talented bakers. Good or bad what they all had in common was that plain was best, and flavored were always disappointing and unenjoyable.
Off the top of my head I can remember trying: chocolate, raspberry, cherry, peanut butter, coffee, salted caramel, coconut, red velvet, and yuzu. Disliked all of them because they all tasted like:
[how good the base cheesecake is] - [how good a cake of this flavor in not cheesecake form would be]
So basically the stronger the flavor the worse it'd be, even though I like all those flavors very much (hence having a list that long before figuring out I just don't like flavored cheesecake)
Sounds like the flavors were too strong, possibly using flavorants rather than (or in addition to) the real thing. Peanut butter cheesecake with an Oreo crust, for example, has an amazing but subtle flavor.
Flavored is bad, but toppings can be good. Adulterating the actual body of the cheesecake is wrong. I do like some goopy cherries on top though, the tartness offsets the sweet, creaminess of the cheesecake.