What made obtaining a UK Visitor visa a terrible experience?

[KumsdaDatsane]

What specific aspects or steps within the process of obtaining a UK Visitor visa contributed to your chatrandom overall negative experience?

[beatricelanier]

What specific aspects or steps within the process of obtaining a UK Visitor visa contributed to your overall negative 2 experience?

I face many problems when obtaining visa. The most impressive one is failing to provide enough evidence of meeting the criteria. I waste many times for this process.