Shed, I won't join you in denigrating the views of those who chose to post a comment.
On-line reviews can be biased by particular groups so I take a relative view - within the same survey and then within similar countries/regions. I then consider how the different operational types vary to see if the methodology throws up anything odd. As I said, it's relative rather than absolute.
So looking at the Top-100, the UK does OK with 3 in the Top-50. (Mind you, Dunnunda does better with 3 in the Top-25!).
You might discount Asian airports for cultural reasons but that doesn't explain Munich's score.
(BTW, your beloved ranks 90th)
The World's Top 100 Airports - 2015
1 Singapore Changi
2 Incheon Intl Airport
3 Munich Airport
4 Tokyo Intl Haneda
5 Hong Kong Intl Airport
6 Centrair Airport
7 Zurich Airport
8 London Heathrow
9 Kansai Intl Airport
10 Doha Hamad Airport
11 Narita Intl Airport
12 Frankfurt Airport
13 Amsterdam Schiphol
14 Vancouver Airport
15 Helsinki Airport
16 Beijing Capital Airport
17 Brisbane Airport
18 Copenhagen Airport
19 Cologne/Bonn Airport
20 Taiwan Taoyuan Airport
21 Auckland Airport
22 Cape Town Airport
23 Sydney Airport
24 Kuala Lumpur Airport
25 Melbourne Airport
26 Dubai Airport
27 Barcelona Airport
28 Denver Airport
29 Vienna Airport
30 Johannesburg Intl
31 Madrid-Barajas Airport
32 Cincinnati/Kentucky
33 Paris CDG Airport
34 Shanghai Hongqiao
35 Durban Airport
36 Bangkok Suvarnabhumi
37 San Francisco Airport
38 Abu Dhabi Airport
39 Dusseldorf Airport
40 Hamburg Airport
41 London City Airport
42 Gimpo Intl Airport
43 Hartsfield-Jackson
44 Toronto Pearson
45 Gatwick Airport
46 Bogota El Dorado
47 Bahrain Airport
48 Xi'an Airport
49 Lima Airport
50 Chengdu Airport
51 Christchurch Airport
52 Haikou Meilan Airport
53 Moscow Domodedovo
54 Seattle-Tacoma
55 Gold Coast Airport
56 Oslo Airport
57 Lisbon Airport
58 Dallas/Fort Worth
59 New York JFK Airport
60 Athens Intl Airport
61 Halifax Stanfield
62 Quito Intl Airport
63 Jakarta Intl Airport
64 Mumbai Intl Airport
65 Guayaquil Airport
66 Delhi Intl Airport
67 Stockholm Arlanda
68 Hyderabad Airport
69 Adelaide Airport
70 Porto Airport
71 Houston George Bush
72 Keflavik Intl Airport
73 Perth Airport
74 Bengaluru Airport
75 Minneapolis-St Paul
76 Budapest Intl Airport
77 Shenzhen Airport
78 Moscow Sheremetyevo
79 Billund Airport
80 Dublin Airport
81 Sanya Phoenix Airport
82 Hanoi Noi Bai Airport
83 Brussels Airport
84 Nice Airport
85 Guangzhou Airport
86 Panama Tocumen
87 Birmingham Airport
88 Montréal Intl Airport
89 Detroit Airport
90 Manchester Airport
91 Los Angeles Airport
92 Malta Intl Airport
93 Prague Airport
94 Muscat Intl Airport
95 Stansted Airport
96 Geneva Intl Airport
97 Boston Logan Airport
98 Fukuoka Airport
99 Luxembourg Airport
100 Kazan Intl Airport
Source: The World's Top 100 Airports in 2016