I understand what you mean. I've been fortunate to have a handful of experienced trippers that I trust to trip with who are always welcome additions to any trip I experience.

I've been on the other side of this as well. Having to babysit an inexperienced tripper is no fun at all. Their discomfort and unsettling behavior can spread to the group and lead to the whole thing going off the rails.

I keep this as a rule, however, because I feel like it's important to have multiple opinions about what is happening and what we should be doing. The few trips I've taken by myself usually lead to too much overthinking and never actually doing any of the things I prepare for myself. The last time I tripped alone was on a couple of hits of acid. I had a lot of things planned. Virtual Reality, music recording, writing, and some movies/videos I thought would be good. I ended up hiding under a blanket and binge-watching Arrested Development on my phone for 12 hours.

So, I wouldn't categorize them as "bad trips". I just feel like something is missing when I trip alone. I get confused, can't make any decisions, and end up doing things that are safe and constant.