Any "conservative" content that has been kicked off of platforms like YouTube has been specifically targeted not for political reasons but because they were spreading hate speech and/or dangerous disinformation. Things like racism, sexism, religious intolerance, specific accusations (ie Joe Scarborough is a murderer) or dangerous disinformation (ie 5G causes Coronavirus) are not intrinsic to any group of people. There's still plenty of content around mainstream conservatism that can be viewed freely.
I think any attempt to argue a slippery slope isn't valid. People aren't computers and just because you can't apply a mathematically rigorous distinction between these kinds of speech doesn't mean that a reasonable person can't easily distinguish them.