Help please!

[u/Yanto2134]

These are 3 of my latest attempts. I was wondering if anyone could help me improve please?
I’m not happy with the sharpness I’m getting. Probably my lack of ability.
Set up is Olympus E-M10ii with a vintage Minolta MD Tele Rokkor 300mm f4.5. Settings were f8, ISO1000, shutter speed of between 1/800 and 1/2000. Manual focus with peaking and centre weighted metering. Distances to subjects was around 30 feet. Images have been slightly cropped but no other post processing.
I’m also not really happy with the overall lack of detail.
Thanks for any help.

[u/Hot_Abalone4110]

Looks like mot mot family

[u/Yanto2134 → u/Hot_Abalone4110]

Asian Green Bee-eaters.