Such people are called "high-handed", too sure of themselves, arrogant and over-proud.

这种人自以为了不起，傲慢、狂妄，惯施“高压手段”。 。

youdao

If you're a Labour MP the ill-tempered debate was about a 'partisan', 'ill-conceived', 'ill-judged', 'ham-fisted', 'high-handed', 'arrogant' - and I could go on - attempt to impose new electoral arrangements on the Assembly with little regard to what its members, or the people of Wales want, arrangements, at that, that'll favour the Tories in future elections.

BBC: When David met Carwyn: the sequel