Salesforce Marketing interview questions

Interview experience was pretty standard of large tech companies: lead recruiter/recruiting coordinator on point to schedule interviews and answer questions. Nothing really out of the ordinary with this except for a few (forgivable) delays. Everyone I interviewed with was extremely pleasant and provided positive feedback to my recruiter. However, this is where the problem arises: after about 6 weeks of interviewing, spread over six interviews, and an intensive take home assignment culminating in an hour-long panel presentation for the final round, I was eliminated from contention with the only feedback being that I didn't have 'enough hands-on experience.' That's a completely fair evaluation that the hiring manager is entitled to have - but my experience was a constant throughout the process. It didn't change, and I feel like this is something that could have been determined in the first one, two, three, four, or even five interviews - but definitely could have been determined before the assignment phase. All in, felt like a huge waste of time and massive effort. A rejection for another reason would have gone over better - but just felt like this could have been avoided and I'm left feeling my time wasn't respected or valued.