Greetings. It appears that you have encountered a work-related situation in which those who are adept at communication and persuasion may not necessarily be the most effective or capable individuals. This has led to some challenges for you.
One might contend that the "cunning and manipulative" work style is not aligned with one's personal values and may even elicit feelings of resentment. When an individual with mediocre professional ability gains tangible benefits due to their ability to perform well and utilize rhetoric, it can potentially impact one's values and lead to feelings of resentment, stiflement, or anger.
Conversely, comparing oneself to this individual may evoke feelings of self-doubt and criticism when examining one's own attributes. What was initially a personal trait, namely a dedication to hard work and a lack of proficiency in expressing oneself, may now be perceived as a liability and a challenge that one is powerless to overcome when confronted with the exemplary performance of one's colleagues.
This aspect of the challenge to self-confidence may be a significant source of pressure.
To effectively cope with these pressures, the initial step is to recognize and affirm one's own strengths. This can be achieved by sorting and recording them in various categories, such as professional knowledge, performance, work attitude, learning ability, and so forth. This process allows individuals to identify their inherent advantages and areas for continuous improvement. These strengths represent an invaluable inner quality and ability, which cannot be taken away by external factors.
One must not allow oneself to be influenced by the opinions of others, whether positive or negative. It is important to remember that one is not working for others, nor is one striving to outdo them. One can be one's own boss and comrade-in-arms mentally, and one can gain firm strength by focusing on one's own sustainable growth.
Furthermore, the workplace is populated by a diverse array of individuals and circumstances. One can attempt to disengage from the situation and adopt the role of an observer. While this colleague appears to be thriving with his approach, it is essential to consider whether all those who have flourished within the unit share his disposition.
It is also important to consider whether there are alternative opportunities that could facilitate career progression, or whether they are merely opportunities for personal growth. Once these factors have been taken into account, it is possible to determine the most appropriate career path.
From others, what can be learned, and what should be avoided?
In dealing with this colleague, it is advisable to be as objective as possible. It would be beneficial to apply a "filter" to the information presented in conversations, focusing on the key issues and disregarding the rest.
While it may be challenging initially, this is a skill that can be developed and refined over time.


Comments
I understand the frustration you're feeling. It's tough when someone who is less competent but more vocal gets ahead. Building a solid core means focusing on your strengths and not comparing yourself to others. Confidence comes from within, and improving your skills and knowledge will naturally enhance your presence.
It's important to recognize that being good at talking doesn't necessarily equate to competence. Keep developing your professional abilities and let your work speak for itself. Over time, quality work tends to be recognized. Sometimes it's about finding the right audience who values substance over style.
Perhaps it's time to find a mentor or a trusted colleague who can provide guidance and support. Having someone in your corner can help you navigate office politics and build up your confidence in dealing with such individuals.
Remember, not everyone has to be the loudest voice in the room to be effective. Quiet leadership has its own power. Focus on cultivating your unique strengths and continue to contribute meaningfully. Your value isn't defined by how much you talk but by what you achieve.
Consider practicing your communication skills in a safe environment, like a workshop or a group of friends. Being able to articulate your thoughts clearly can bolster your confidence and give you the tools to handle those verbal provocations more effectively.