Ubuntu 18.04.3 LTS on my system is pretty slow, while booting and also while operating

Does the system have a make and model?
Is the OS fully updated?
Do you have the latest BIOS?
Are you using a platter based drive or an SSD?

Details please....

I'm using Ubuntu on Lenovo Ideapad 330 Ryzen 5 Quad Core - (8 GB DDR4 RAM/1 TB HDD).
OS is fully updated.
How do I check if BIOS are updated, or if not how to update the BIOS?
Laptop is having typical platter drive.

Here is the information about BIOS:
dhruv@dhruv-Lenovo-ideapad-330-15ARR:~$ sudo dmidecode -t 0
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.1.1 present.

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
 Vendor: LENOVO
 Version: 7VCN24WW
 Release Date: 06/15/2018
 Address: 0xE0000
 Runtime Size: 128 kB
 ROM Size: 8192 kB
 Characteristics:
  PCI is supported
  BIOS is upgradeable
  BIOS shadowing is allowed
  Boot from CD is supported
  Selectable boot is supported
  BIOS ROM is socketed
  EDD is supported
  Japanese floppy for NEC 9800 1.2 MB is supported (int 13h)
  Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
  5.25"/360 kB floppy services are supported (int 13h)
  5.25"/1.2 MB floppy services are supported (int 13h)
  3.5"/720 kB floppy services are supported (int 13h)
  3.5"/2.88 MB floppy services are supported (int 13h)
  8042 keyboard services are supported (int 9h)
  CGA/mono video services are supported (int 10h)
  ACPI is supported
  USB legacy is supported
  Targeted content distribution is supported
  UEFI is supported
 BIOS Revision: 1.24
 Firmware Revision: 1.24

What is the output of:

sudo lshw -C display

Thanks

Here is the output:
dhruv@dhruv-Lenovo-ideapad-330-15ARR:~$ sudo lshw -C display
[sudo] password for dhruv:
  *-display
       description: VGA compatible controller
       product: Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:03:00.0
       version: c4
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
       configuration: driver=amdgpu latency=0
       resources: irq:58 memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:1000(size=256) memory:e0600000-e067ffff

Seems you are using the open source video driver. If you use the proprietary driver it may help.

I tried using proprietary driver driver, but then the system was crashing. Therefore I removed the driver.
Can you help me installing the proprietary driver as I'm new to Linux OS.

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