A bit inflammatory imo, given the scale of the challenge[^1], but definitely there were several failures under her tenure that are worth noting. Youtube Red (later Premium), Music, and Originals all seemed to not really pan out, and as a result YT seems desperate w.r.t. existing revenue streams. Copyright is also pretty bad, probably bending over backwards for advertisers which also seems to stem from that same desperation. In fact so much of the burden for following regulations, laws, and policies falls to the content creators (stuff like making minor-appropriate content) that yt's monopoly power over the video creator space really is evidenced. Even then, communication is so poor even by google's standards that one wonders yt employees even use the platform - if they even exist at all.
On the other hand, yt streaming and shorts seem to be slowly improving, in the same way google as a whole only seems to innovate insofar as they match exactly what their competitors have already produced. And problems aside, yt is still seems to be growing in popularity and relevance, even with TikTok's competition. If yt can figure out how to actually obtain revenue w/o turning to shadier and shadier advertisers, they might not have to push creators just shy of abandoning the platform, but it's not like creators have anywhere else to go.
[^1]: Revenues for yt continue to miss expectations, payouts for creators and ad spam are obviously low hanging targets. Doesn't make it right, but running a video service isn't cheap.