It can be tricky to take on Protean Sledge solo I agree but as other have pointed out there are points where he is vulnerable.
To every one else saying "GIT GUD", not everyone one is amazing at video games like you. For some Extraction is too easy, for others it may be the most difficult game they've ever played.
If you don't have something nice to say, or useful advice to give, then keep it to yourself.