Definitely. Toxic positivity is not what positive psychology is about at all.
Positive psychology is a branch of psychology that focuses on positive aspects of the human experience — concepts like resilience, optimism and gratitude — instead of mental illness and dysfunction.
Martin Seligman, the "father of positive psychology," played a pivotal role. Mihaly Csikszentmihalyi is known for his work on "flow states," while Barbara Fredrickson's broaden-and-build theory of positive emotions is a powerful model for finding inspired solutions to life's problems. I always recommend Shawn Achor's book.
Limiting beliefs are so insidious. That's where approaches like Byron Katie's The Work or non-duality philosophies come into play. Though any religious text has a ton of language around the power of belief.
Personally from my brief exposure to it, I still find something like the Work to be uninspiring. I want to strive for beauty in the world, it's one of my deepest motivators. I believe other people are motivated more by beauty and curiosity than by fear, anger and force. I've already achieved many results in this way (won't go into it here but it has to do with transforming my community).
So, a pro tip achieving results with positive thinking is, all you need is a sliver of belief that something is possible. For example, say for the purposes of this thread, you believe you are "rapidly aging" due to some factor you have recently fixated on -- or just in general, "aging" and you think this is a bad thing. If you can imagine reading a headline that says "scientists discover anti-aging force field that causes others to see you as extremely vibrant", that's all you need. You can discard this concern for the short term, telling yourself, well, when it comes time, I will definitely investigate that force field stuff. Let go of the concern for an hour, a day, a week, 10 years.
But certainly, people love to complain and cling to suffering. I'm no different. It's hard, never-ending work rebuilding your beliefs. I also know that most people won't resonate with what I say. I still put it out there because maybe there's one person for whom this will be a godsend, like it was for me when I was at the lowest point in my life. You have to imagine your way out.