1.One first Senior because of having grudges with another senior and if you are working under one of them, senior having grudges can spoil your career ,even you are not having personal grudges.If you have any work with that first senior,he will make you run after him like you are nothing, reason is only you are working under that senior whom he has grudges.
2.discrimination always done by seniors which can demotivate anybody.
3.
Oniondev technologies is a good place for beginners to start with. You get a good team and an amazing CTO who supports for your work. Employee's work is always acknowledged. Playing TT daily is part of schedule 😉