Strange could BFR her to any location in the wider galaxy, possibly multiverse. And her levitating is a non-factor since he could create many hundreds of portals at once.
Not to mention, In-character Scarlet Witch never crushes people unless she hates them with a burning passion. She'd reasonably use TK to crush him pretty late into the fight, and by that point Strange would've killed her.
Strange could BFR with his portals or send her to the mirror dimension. And while this wasn't a fight, keep in mind, he did instantly BFR Loki, assumingly to prevent conflict. Also, let's not forget, Strange has a far higher Intelligence stat, and is a better combatant and most likely tactician. Scarlet Witches tactics mostly boil down to brute forcing her opponents with Psionic blasts, while Dr.Strange comes up with arguably much cleverer and less-hard-to-predict techniques. Dr.Strange outsmarts her by a very long margin.
It comes down to 'Does strange BFR/use superior AP to kill her before Scarlet witch uses TK', and the answer to that is an absolute yes. Docotr Strange could vaporize her with AP, or create portals, or send her to the mirror dimension, all of which he does commonly. Any construct kills her pretty quickly. Doctor Strange outsmarts her and could easily come up with a tactic to defeat her. Scarlet Witch has less experience, far lower intelligence, and overall gets outclassed, though not technically a stomp.
Strange has also been seen using his portals against enemies, if you were wondering. Strange has so many ways to kill her in this fight. Nevermind the fact that if she leads with an energy blast-which she will almost definitely do-Strange could: -Duplicate himself and then kill her -Dodge and then BFR her with portals -Dodge and then BFR her with mirror dimension -Launch virtually any construct to kill her immediately
If she somehow dodges one of these options, then she'd just create energy shields and then be BFR'd immediately.